https://code-reference.com/ 2026-04-25T13:21:50+02:00 https://code-reference.com/ https://code-reference.com/ttps://code-reference.com/lib/tpl/dokuwiki/images/favicon.ico text/html 2013-02-15T20:49:14+02:00 https://code-reference.com/arduino/constants/constants?rev=1360957754&do=diff Constants are predefined variables in the Arduino language. They are used to make the programs easier to read. We classify constants in groups. Defining Logical Levels, true and false (Boolean Constants) There are two constants used to represent truth and falsity in the Arduino language: true, and false. text/html 2024-02-16T01:06:02+02:00 https://code-reference.com/c/keywords/false?rev=1708041962&do=diff description of false false is in work by code-reference.com if you are faster... don't hasitate and add it no example at the moment output of false c example no example at the moment text/html 2024-02-16T01:05:52+02:00 https://code-reference.com/c/graphics.h/mousex?rev=1708041952&do=diff mousex Syntax of mousex #include "graphics.h" int mousex(void); Description of mousex The mousex function is available in the winbgim implementation of BGI graphics. It returns the most recent x coordinate of the mouse within the graphics window. X-coordinates start with 0 at the left edge of the window and increase to getmaxx( ) at the right edge of the window. text/html 2024-02-16T01:04:08+02:00 https://code-reference.com/arduino/control_structures/while?rev=1708041848&do=diff Description while loops will loop continuously, and infinitely, until the expression inside the parenthesis, () becomes false. Something must change the tested variable, or the while loop will never exit. This could be in your code, such as an incremented variable, or an external condition, such as testing a sensor. text/html 2024-02-16T01:04:19+02:00 https://code-reference.com/arduino/boolean_operators/boolean?rev=1708041859&do=diff !Boolean Operators These can be used inside the condition of an if (conditional) and ==, !=, <, > (comparison operators) statement. && (logical and) True only if both operands are true, e.g. if (digitalRead(2) == HIGH && digitalRead(3) == HIGH) { // read two switches // ... } text/html 2024-02-16T01:05:51+02:00 https://code-reference.com/c/graphics.h/mousey?rev=1708041951&do=diff mousey Syntax of mousey #include "graphics.h" int mousey(void); Description of mousey The mousey function is available in the winbgim implementation of BGI graphics. It returns the most recent y coordinate of the mouse within the graphics window. Y-coordinates start with 0 at the top edge of the window and increase to getmaxy( ) at the bottom edge of the window. text/html 2024-02-16T01:05:56+02:00 https://code-reference.com/c/graphics.h/registermousehandler?rev=1708041956&do=diff registermousehandler Example of registermousehandler /* mouse example */ #include "graphics.h" // The click_handler will be called whenever the left mouse button is // clicked. It checks copies the x,y coordinates of the click to // see if the click was on a red pixel. If so, then the boolean // variable red_clicked is set to true. Note that in general // all handlers should be quick. If they need to do more than a little // work, they should set a variable that will trigger the work going, … text/html 2024-02-16T01:04:32+02:00 https://code-reference.com/cpp/control_structures/if?rev=1708041872&do=diff if The 'if' statement is one of many methods to control the flow of a program. It tests whether or not a certain condition is true, and then executes code based on the test. #include <iostream> using namespace std; int main(){ if (TRUE){ cout << "This statement will be executed"; } if (FALSE){ cout << "This one will not"; } return 0; } text/html 2024-02-16T01:04:11+02:00 https://code-reference.com/arduino/data_types/booleanvariables?rev=1708041851&do=diff A boolean holds one of two values, true or false. (Each boolean variable occupies one byte of memory.) Example int LEDpin = 5; // LED on pin 5 int switchPin = 13; // momentary switch on 13, other side connected to ground boolean running = false; void setup() { pinMode(LEDpin, OUTPUT); pinMode(switchPin, INPUT); digitalWrite(switchPin, HIGH); // turn on pullup resistor } void loop() { if (digitalRead(switchPin) == LOW) { // switch is pressed - pullup keeps pin high … text/html 2024-02-16T01:03:58+02:00 https://code-reference.com/java/control_structures/else?rev=1708041838&do=diff if ( condition == true ){ command; } else { // if the "if" condition false command; } check if a condition is true or false example of else package plausibilitycheck; import java.util.Scanner; public class Plausibilitycheck{ /** * @param args the command line arguments */ public static void main(String[] args) { int celsius; double fahrenheit; Scanner scan = new Scanner(System.in); System.out.print("Please … text/html 2013-01-24T04:03:54+02:00 https://code-reference.com/lua/codea/stargenerator/main.lua?rev=1358996634&do=diff -- stars function setup() displayMode(FULLSCREEN) createstars() checkagain = false end function createstars() stars = {} for i = 1,175 do --rx = math.random(1,1200) -- ry= math.random(1,800) s= Star(true) --u = { x=rx, y=ry} table.insert(stars,s) end for i = 1,50 do --rx = math.random(1,1200) -- ry= math.random(1,800) s= Star(false) --u = { x=rx, y=ry} table.insert(stars,s) end … text/html 2013-02-26T23:50:57+02:00 https://code-reference.com/c/mysql/mysql.h/mysql_commit?rev=1361919057&do=diff my_bool mysql_commit(MYSQL *mysql) description of mysql_commit mysql_commit Commits the current transaction. The action of this function is subject to the value of the completion_type system variable. if the value of completion_type is 2, the server performs a release after terminating a transaction and closes the client connection. The client program should call mysql_close(). text/html 2024-02-16T01:05:48+02:00 https://code-reference.com/c/graphics.h/kbhit?rev=1708041948&do=diff kbhit Syntax of kbhit #include "graphics.h" int kbhit(void); Description of kbhit The kbhit function is available in the winbgim implementation of BGI graphics. You do not need to include conio.h; just include graphics.h. The function returns true (non-zero) if there is a character in the input buffer ready to read. Otherwise it returns false. In order to work, the user must click in the graphics window (i.e., the Windows focus must be in the graphics window). text/html 2024-02-16T01:05:47+02:00 https://code-reference.com/c/graphics.h/getmouseclick?rev=1708041947&do=diff getmouseclick Syntax of getmouseclick #include "graphics.h" voud getmouseclick(int kind, int&amp; x, int&amp; y); Description of getmouseclick The getmouseclick function is available in the winbgim implementation of BGI graphics. This function sets x and y to the pixel coordinates of an unprocessed event of the specified kind. If there is no such event, then the function sets both x and y to -1. The value of the argument kind may be any of the constants listed above. After calling getmo… text/html 2024-02-16T01:05:48+02:00 https://code-reference.com/c/graphics.h/initwindow?rev=1708041948&do=diff initwindow Syntax of initwindow #include "graphics.h" int initwindow(int width, int height, const char* title="Windows BGI", int left=0, int top=0, bool dbflag=false, closeflag=true); Description of initwindow The initwindow function is available in the winbgim implementation of BGI graphics. You do not need to include conio.h; just include graphics.h. The function initializes the graphics system by opening a graphics window of the specified size. The first two parameters (width and hei… text/html 2024-02-16T01:04:38+02:00 https://code-reference.com/cpp/cassert/assert?rev=1708041878&do=diff void assert(scalar expression); With assert you can test your programm for logical errors. The assert () macro will insert diagnostics into programs When executed, if expression (which is a scalar type you have) is false (ie, compares equal to 0), assert (), provide information about the particular call that failed to stderr and abort () text/html 2024-02-16T01:05:58+02:00 https://code-reference.com/c/graphics.h/clearmouseclick?rev=1708041958&do=diff clearmouseclick Syntax of clearmouseclick #include "graphics.h" void clearmouseclick(int kind); Description of clearmouseclick The clearmouseclick function is available in the winbgim implementation of BGI graphics. This is just like getmouseclick, except it does not provide the x and y coordinates of the event. The value of the argument kind may be any of the constants listed above. After calling getmouseclick, for a particular kind of event, the ismouseclick will return false for that… text/html 2024-02-16T01:12:01+02:00 https://code-reference.com/java/io/printstream/checkerror?rev=1708042321&do=diff Flush the stream and return the value of error flag checkError(); return value: boolean true/false Language Example no example jet output output for example text/html 2024-02-16T01:12:02+02:00 https://code-reference.com/java/io/printstream/close?rev=1708042322&do=diff Close and flush the print stream. close(); return value: if IO error true otherwise false Language Example no example jet output output for example text/html 2014-04-27T15:46:16+02:00 https://code-reference.com/c/assert.h/assert?rev=1398606376&do=diff void assert(scalar expression); With assert you can test your programm for logical errors. The assert () macro will insert diagnostics into programs When executed, if expression (which is a scalar type you have) is false (ie, compares equal to 0), assert (), provide information about the particular call that failed to stderr and abort () text/html 2018-01-12T07:29:07+02:00 https://code-reference.com/java/loops/do?rev=1515738547&do=diff do { command; } while (condition); a do loop will run while a condition is false example of do loop in java package codereferececomjava; public class CodeRefereceComJava { public static void main(String[] args) { int i=4; do { i++; } while(i==4); System.out.println("i is :" + i ); } } text/html 2013-04-10T10:12:37+02:00 https://code-reference.com/java/lang/object/equals?rev=1365581557&do=diff Compares object and indecates if they equal equals(Object); return value: boolean true/false equals Example in java String a = "42"; String b = "144"; if ( a.equals(b) ) { System.out.println(b+" is the answer"); } else { System.out.println(b+" is probably not the answer"); } 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 2024-02-16T01:04:07+02:00 https://code-reference.com/arduino/control_structures/for?rev=1708041847&do=diff Desciption The for statement is used to repeat a block of statements enclosed in curly braces. An increment counter is usually used to increment and terminate the loop. The for statement is useful for any repetitive operation, and is often used in combination with arrays to operate on collections of data/pins. text/html 2024-02-16T01:05:56+02:00 https://code-reference.com/c/graphics.h/setmousequeuestatus?rev=1708041956&do=diff setmousequeuestatus Syntax of setmousequeuestatus #include "graphics.h" voud setmousequeuestatus(int kind, bool status=true); Description of setmousequeuestatus The setmousequeuestatus function is available in the winbgim implementation of BGI graphics. This function controls whether mouse events of a particular kind are queued for processing. If the status parameter is false, then mouse events of the specified kind are not queued. This means that each time a mouse event of that kind oc… text/html 2024-02-16T01:12:02+02:00 https://code-reference.com/java/io/printstream/flush?rev=1708042322&do=diff After all pending data is send to stream the stream will be flushed flush(); return value: boolean true/false Language Example no example jet output no output jet text/html 2013-04-10T10:35:55+02:00 https://code-reference.com/java/control_structures/if?rev=1365582955&do=diff if ( condition == true ){ command; } check if a condition is true or false example of if in java package plausibilitycheck; import java.util.Scanner; public class Plausibilitycheck{ /** * @param args the command line arguments */ public static void main(String[] args) { int celsius; double fahrenheit; Scanner scan = new Scanner(System.in); System.out.print("Please type in Celsius : "); celsius = scan.nextInt(); …