{{keywords>wiki library source code example reference}}

===== isascii =====
<code c>
    int isascii(int char);
</code>

a macro that tests if a char a ASCII char (0-127) is
===== C Sourcecode Example =====
<code c>
/* 
 * isascii example code
 * http://code-reference.com/c/ctype.h/isascii 
 */
#include <stdio.h> /* including standard library */
//#include <windows.h> /* uncomment this for Windows */
 
#include <ctype.h>
 
int main ( void )
{
  int i;
  char string[11]="Test ÖÄ%1";
  for (i=0; i <= 11;i++)
    {
     if ( isascii(string[i]) != 0 )
      {
       printf("character %i isascii char\n",i);
      }
    }
  return 0;
}

</code>
==== output ====
    output:
    user@host:~$ ./isascii 
    character 0 isascii char
    character 1 isascii char
    character 2 isascii char
    character 3 isascii char
    character 4 isascii char
    character 9 isascii char
    character 10 isascii char
    character 11 isascii char