c isdigit function

1#include <stdio.h>
2#include <ctype.h>
3
4int main()
5{
6    char c;
7    c='0';
8    printf("Result when numeric character is passed: %d", isdigit(c));
9
10    c='+';
11    printf("\nResult when non-numeric character is passed: %d", isdigit(c));
12
13    return 0;
14}
15

1Non-zero integer ( x > 0 )	Argument is a numeric character.
2Zero (0)	Argument is not a numeric character.

1isdigit(myChar);