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C library function - isxdigit()
Description
The C library function int isxdigit(int c) checks whether the passed character is a hexadecimal digit.
Declaration
Following is the declaration for isxdigit() function.
int isxdigit(int c);
Parameters
c − This is the character to be checked.
Return Value
This function returns a non-zero value(true) if c is a hexadecimal digit else, zero (false).
Example
The following example shows the usage of isxdigit() function.
#include <stdio.h> #include <ctype.h> int main () { char var1[] = "tuts"; char var2[] = "0xE"; if( isxdigit(var1[0]) ) { printf("var1 = |%s| is hexadecimal character\n", var1 ); } else { printf("var1 = |%s| is not hexadecimal character\n", var1 ); } if( isxdigit(var2[0] )) { printf("var2 = |%s| is hexadecimal character\n", var2 ); } else { printf("var2 = |%s| is not hexadecimal character\n", var2 ); } return(0); }
Let us compile and run the above program to produce the following result −
var1 = |tuts| is not hexadecimal character var2 = |0xE| is hexadecimal character
ctype_h.htm
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