https://code-reference.com/ 2026-05-18T19:23:08+02:00 https://code-reference.com/ https://code-reference.com/ttps://code-reference.com/lib/tpl/dokuwiki/images/favicon.ico text/html 2024-02-16T00:48:22+02:00 https://code-reference.com/c/float.h?rev=1708040902&do=diff float.h Overview Name Description dbl_dig dbl_dig dbl_epsilon dbl_epsilon dbl_mant_dig dbl_mant_dig dbl_max dbl_max dbl_max_exp dbl_max_exp dbl_min dbl_min dbl_min_exp dbl_min_exp flt_dig flt_dig flt_epsilon flt_epsilon flt_mant_dig flt_mant_dig flt_max flt_max flt_max_exp flt_max_exp flt_min flt_min flt_min_exp flt_min_exp flt_radix flt_radix flt_rounds flt_rounds automatically generated overview ... Change this page if you have a better descriptio… text/html 2024-02-16T01:04:25+02:00 https://code-reference.com/arduino/conversion/floatcast?rev=1708041865&do=diff Description Converts a value to the float data type. Syntax float(x) Parameters x: a value of any type Returns float Notes See the reference for float for details about the precision and limitations of floating point numbers on Arduino. See also * float Source: arduino.cc text/html 2024-02-16T01:04:00+02:00 https://code-reference.com/java/io/printwriter?rev=1708041840&do=diff ---------- The PrintWriter class is a simple way of writing to files in Java io. It can be used in many ways and offers a great deal of methods inside the class. Some of these are quite common methods throughout the language itself. I will go through them step by step, giving examples for each. Let's get started: text/html 2024-02-16T01:04:11+02:00 https://code-reference.com/arduino/data_types/float?rev=1708041851&do=diff Description Datatype for floating-point numbers, a number that has a decimal point. Floating-point numbers are often used to approximate analog and continuous values because they have greater resolution than integers. Floating-point numbers can be as large as 3.4028235E+38 and as low as -3.4028235E+38. They are stored as 32 bits (4 bytes) of information. text/html 2024-02-16T01:05:08+02:00 https://code-reference.com/c/datatypes/float?rev=1708041908&do=diff float float 4 Byte 1.2E-38 - 3.4E+38 precision 6 C Sourcecode Example #include <stdio.h> /* including standard library */ //#include <windows.h> /* uncomment this for Windows */ int main(void) { printf("float: %d bytes\n", sizeof(float) ); return 0; } text/html 2013-01-22T13:17:56+02:00 https://code-reference.com/c/datatypes?rev=1358857076&do=diff datatypes Overview Name Description auto auto auto auto bool bool char char const const const const double double float float int int int8 int8 int8 int8 int8_t int8_t int8_t int8_t int16 int16 int16 int16 int16_t int16_t int16_t int16_t int32 int32 int32 int32 int32_t int32_t int32_t int32_t int64 int64 int64 int64 int64_t int64_t int64_t int64_t intmax_t intmax_t intmax_t intmax_t intptr_t intptr_t intptr_t intptr_t int_fast8_t int_fas… text/html 2024-02-16T01:05:42+02:00 https://code-reference.com/c/stdio.h/fscanf?rev=1708041942&do=diff fscanf int fscanf(FILE *stream, const char *format, ...); Performs formatted input conversion, reading from stream stream according to format format. The function returns when format is fully processed. Returns number of items converted and assigned, or EOF if end-of-file or error occurs before any conversion. Each of the arguments following format must be a pointer. Format string may contain: text/html 2013-04-10T10:13:54+02:00 https://code-reference.com/java/util/scanner/nextfloat?rev=1365581634&do=diff public float nextFloat() return float scanned from the input example nextFloat in java package scanner; import java.util.Scanner; public class Scanner { public static void main(String[] args) { /* Create Scanner Object for the input from the keyboard */ Scanner scan = new Scanner(System.in); float currency; System.out.print("Please enter a number: "); currency = scan.nextFloat(); // read currency … text/html 2024-02-16T01:04:14+02:00 https://code-reference.com/arduino/trigonometry/cos?rev=1708041854&do=diff Description Calculates the cos of an angle (in radians). The result will be between -1 and 1. Parameters rad: the angle in radians (float) Returns The cos of the angle (“double”) See also * sin(rad) * tan(rad) * float * double Source: arduino.cc text/html 2024-02-16T01:04:14+02:00 https://code-reference.com/arduino/trigonometry/sin?rev=1708041854&do=diff Description Calculates the sine of an angle (in radians). The result will be between -1 and 1. Parameters rad: the angle in radians (float) Returns the sine of the angle (double) See also * cos(rad) * tan(rad) * float * double Source: arduino.cc text/html 2013-04-16T03:30:45+02:00 https://code-reference.com/cpp/cmath/pow?rev=1366075845&do=diff float pow(float base, float exponent); double pow(double base, double exponent); double pow(double base, int exponent); pow() returns base raised to the exp power. cpp Sourcecode Example #include <iostream> /* including standard library */ #include <cmath> /* including math library */ using namespace std; int main( void ) { //cout.setf(ios::fixed, ios::floatfield); cout.precision(8); cout << "4 raised to the 2nd power is: " << pow(4, 2) << endl; return 0; } text/html 2024-02-16T01:04:21+02:00 https://code-reference.com/arduino/math/pow?rev=1708041861&do=diff Description Calculates the value of a number raised to a power. Pow() can be used to raise a number to a fractional power. This is useful for generating exponential mapping of values or curves. Parameters base: the number (float) exponent: the power to which the base is raised (float) text/html 2024-02-16T00:48:17+02:00 https://code-reference.com/arduino/data_types?rev=1708040897&do=diff data types Overview Name Description array array booleanvariables booleanvariables byte byte char char double double float float int int long long short short string string stringobject stringobject unsignedchar unsignedchar unsignedint unsignedint unsignedlong unsignedlong void void word word automatically generated overview ... Change this page if you have a better description text/html 2024-02-16T01:04:14+02:00 https://code-reference.com/arduino/trigonometry/tan?rev=1708041854&do=diff Description Calculates the tangent of an angle (in radians). The result will be between negative infinity and infinity. Parameters rad: the angle in radians (float) Returns The tangent of the angle (double) See also * sin(rad) * cos(rad) * float * double text/html 2024-02-16T01:12:26+02:00 https://code-reference.com/objective-c/foundation.framework/nsnumber.h/initwithfloat?rev=1708042346&do=diff initWithFloat - (id)initWithFloat:(float)value; ObjC Sourcecode Example float myFloat = 1.123456f; //******************** Initializing NSNumber Object ************************* //** NSNumbers need to be released, if you`re not working with ARC! ** NSNumber *myFloatNumber = [[NSNumber alloc]initWithFloat:myFloat]; NSLog(@"myFloatNumber:%@", myFloatNumber); text/html 2013-02-15T19:15:27+02:00 https://code-reference.com/arduino/arithmetic_operators/arithmetic?rev=1360952127&do=diff Description These operators return the sum, difference, product, or quotient (respectively) of the two operands. The operation is conducted using the data type of the operands, so, for example, 9 / 4 gives 2 since 9 and 4 are ints. This also means that the operation can overflow if the result is larger than that which can be stored in the data type (e.g. adding 1 to an int with the value 32,767 gives -32,768). If the operands are of different types, the “larger” type is used for the calculat… text/html 2013-01-22T02:30:47+02:00 https://code-reference.com/c/keywords?rev=1358818247&do=diff C89 Keywords * auto * break * case * char * const * continue * default * do * double * else * enum * extern * float * for * goto * if * int * long * register * return * short * signed * sizeof * static * struct * switch * typedef * union * unsigned * void * volatile * while text/html 2024-02-16T01:12:26+02:00 https://code-reference.com/objective-c/foundation.framework/nsnumber.h/floatvalue?rev=1708042346&do=diff floatValue - (float)floatValue; Returns the receiver’s value. Return Value - The receiver’s value as datatyp, converting it as necessary. ObjC Sourcecode Example //** Sample Datatype ** float myFloat = 1.123456f; //** Initializing NSNumber Object ** NSNumber *myFloatNumber = [[NSNumber alloc]initWithFloat:myFloat]; //** To access your value use floatValue ** if ([myFloatNumber floatValue] == 1.123456f) { NSLog(@"myFloatNumber:%@… text/html 2013-02-15T20:47:55+02:00 https://code-reference.com/arduino/variable_scope_and_qualifiers/variabledeclaration?rev=1360957675&do=diff A variable is a way of naming and storing a value for later use by the program, such as data from a sensor or an intermediate value used in a calculation. Declaring Variables Before they are used, all variables have to be declared. Declaring a variable means defining its type, and optionally, setting an initial value (initializing the variable). Variables do not have to be initialized (assigned a value) when they are declared, but it is often useful. text/html 2024-02-16T01:12:25+02:00 https://code-reference.com/objective-c/foundation.framework/nsnumber.h/numberwith?rev=1708042345&do=diff numberWith + (NSNumber *)numberWithChar:(char)value; + (NSNumber *)numberWithUnsignedChar:(unsigned char)value; + (NSNumber *)numberWithShort:(short)value; + (NSNumber *)numberWithUnsignedShort:(unsigned short)value; + (NSNumber *)numberWithInt:(int)value; + (NSNumber *)numberWithUnsignedInt:(unsigned int)value; + (NSNumber *)numberWithLong:(long)value; + (NSNumber *)numberWithUnsignedLong:(unsigned long)value; + (NSNumber *)numberWithLongLong:(long long)value; + (NSNumber *)numberWithUnsi… text/html 2024-02-16T01:04:11+02:00 https://code-reference.com/arduino/data_types/double?rev=1708041851&do=diff Desciption Double precision floating point number. On the Uno and other ATMEGA based boards, this occupies 4 bytes. That is, the double implementation is exactly the same as the float, with no gain in precision. On the Arduino Due, doubles have 8-byte (64 bit) precision. text/html 2024-02-16T01:12:26+02:00 https://code-reference.com/objective-c/foundation.framework/nsnumber.h/initwith?rev=1708042346&do=diff - (id)initWithChar:(char)value; - (id)initWithUnsignedChar:(unsigned char)value; - (id)initWithShort:(short)value; - (id)initWithUnsignedShort:(unsigned short)value; - (id)initWithInt:(int)value; - (id)initWithUnsignedInt:(unsigned int)value; - (id)initWithLong:(long)value; - (id)initWithUnsignedLong:(unsigned long)value; - (id)initWithLongLong:(long long)value; - (id)initWithUnsignedLongLong:(unsigned long long)value; - (id)initWithFloat:(float)value; - (id)initWithDouble:(double)value; - (id)i… text/html 2024-02-16T01:04:13+02:00 https://code-reference.com/arduino/variable_scope_and_qualifiers/const?rev=1708041853&do=diff The const keyword stands for constant. It is a variable qualifier that modifies the behavior of the variable, making a variable ”read-only”. This means that the variable can be used just as any other variable of its type, but its value cannot be changed. You will get a compiler error if you try to assign a value to a const variable. text/html 2018-01-12T07:29:06+02:00 https://code-reference.com/java/datatypes?rev=1515738546&do=diff package datatypes; public class DataTypes { public static void main(String[] args) { // primitiv Datatypes boolean aa = true; // 1 bit char bb = 'A'; // 2 Bytes char cc = 65; // 2 Bytes byte dd = 12; // 1 Byte -128 - +127 short ee = 234; // 2 Bytes -32768 - +32767 int ff = 4711; // 4 Bytes long gg = 34567; // 8 Bytes float hh = 3.14f; // 4 Bytes d… text/html 2024-02-16T01:05:59+02:00 https://code-reference.com/c/keywords/float?rev=1708041959&do=diff see float text/html 2024-02-16T01:04:48+02:00 https://code-reference.com/c/stdlib.h/atof?rev=1708041888&do=diff atof #include <stdlib.h> double atof(const char *str); Description The atof() function converts the initial portion of the string pointed to by nptr to double. The behavior is the same as strtod(nptr, (char **) NULL); except that atof() does not detect errors. text/html 2014-06-04T18:45:53+02:00 https://code-reference.com/cpp/variables?rev=1401900353&do=diff Variables Variables are the means of storing data in a program. Say you want to make a calculator, you need to use variables. Say you want to make a program that takes in a word and then modifies it, you need to use variables. Variables can be created and “destroyed”(deconstructing comes later on so don't get your hopes up). The value or information that they store can be changed and in some cases, that you make it so, cannot be. Except for the syntax of the language, you are in control! text/html 2024-02-16T01:12:02+02:00 https://code-reference.com/java/io/printstream/print?rev=1708042322&do=diff Outputs the string parameter without a line return print(parameter): void parameters are: boolean, char, char[], double, float, int, long, Object, String return value: void Language Example System.out.print("Hello"); System.out.print("I am a programmer"); text/html 2024-02-16T01:12:02+02:00 https://code-reference.com/java/io/printstream/println?rev=1708042322&do=diff This line outputs the string parameter to the console with a line return. println(parameter): void parameters are: boolean, char, char[], double, float, int, long, Object, String Language Example System.out.println("Hello"); System.out.println("I am a programmer"); System.out.println(" 3 + 4 = " + 3+4 ); // appends 3 and 4 to the string System.out.println(" 3 + 4 = " + (3+4) ); // calculate 3+4 before the string "7" added text/html 2024-02-16T01:04:24+02:00 https://code-reference.com/arduino/utilities/sizeof?rev=1708041864&do=diff Description The sizeof operator returns the number of bytes in a variable type, or the number of bytes occupied by an array. Syntax sizeof(variable) Parameters variable: any variable type or array (e.g. int, float, byte) Example code The sizeof operator is useful for dealing with arrays (such as strings) where it is convenient to be able to change the size of the array without breaking other parts of the program. text/html 2013-02-25T16:22:36+02:00 https://code-reference.com/c/stdio.h/vfscanf?rev=1361805756&do=diff int vfscanf ( FILE * stream, const char * format, va_list arg ); description of vfscanf The vscanf(), vfscanf(), and vsscanf() functions shall be equivalent to the scanf(), fscanf(), and sscanf() functions, respectively, except that instead of being called with a variable number of arguments, they are called with an argument list as defined in the <stdarg.h> header. These functions shall not invoke the va_end macro. As these functions invoke the va_arg macro, the value of ap after the return … text/html 2024-02-16T01:04:13+02:00 https://code-reference.com/arduino/variable_scope_and_qualifiers/scope?rev=1708041853&do=diff Variables in the C programming language, which Arduino uses, have a property called scope. This is in contrast to languages such as BASIC where every variable is a global variable. A global variable is one that can be seen by every function in a program. Local variables are only visible to the function in which they are declared. In the Arduino environment, any variable declared outside of a function (e.g. setup(), loop(), etc. ), is a global variable. text/html 2024-02-16T01:12:27+02:00 https://code-reference.com/objective-c/foundation.framework/nsnumber.h/descriptionwithlocale?rev=1708042347&do=diff descriptionWithLocale - (NSString *)descriptionWithLocale:(id)aLocale Returns a string that represents the contents of the receiver for a given locale. ObjC Sourcecode Example //** Sample Datatypes ** int myInt= 1000000; double myDouble = 3.14; float myFloat = 1.123456f; char myChar = 'w'; //** Initializing NSNumber Objects ** NSNumber *myIntNumber = [[NSNumber alloc]initWithInt:myInt]; NSNumber *myDoubleNumber = [[NSNumber alloc]initWithDouble… text/html 2024-02-16T01:05:31+02:00 https://code-reference.com/c/wchar.h/wcstof?rev=1708041931&do=diff wcstof #include <wchar.h> float wcstof(const wchar_t *restrict, wchar_t **restrict); return value C Sourcecode Example no example yet output text/html 2013-02-25T16:27:34+02:00 https://code-reference.com/c/stdio.h/vsscanf?rev=1361806054&do=diff int vsscanf(const char *restrict s, const char *restrict format, va_list arg); description of vsscanf The vscanf(), vfscanf(), and vsscanf() functions shall be equivalent to the scanf(), fscanf(), and sscanf() functions, respectively, except that instead of being called with a variable number of arguments, they are called with an argument list as defined in the <stdarg.h> header. These functions shall not invoke the va_end macro. As these functions invoke the va_arg macro, the value of ap aft… text/html 2013-04-15T09:30:44+02:00 https://code-reference.com/java/io/printstream/format?rev=1366011044&do=diff format args to the format string format and write the result to the stream format(String format, Object... args); return value: stream sign Description 0 if the place is not busy they prints a 0 # if the place is not busy they prints nothing . decimal separator Separates and decimal places. , Groups the numbers (a group is as large as the distance from ”,” to ”.”). ; Delimiter. To the left of the pattern is positive, the right for negative numbers. - The default character for the negative…