isdigit Function

It test the given character, whether it is a digit (0 to 9).

It returns nonzero if ch is a digit or zero is returned .

Syntax :

int isdigit(int ch);

Example

#include <ctype.h>

#include <stdio.h>

  void main() {

	char ch='1';

	if (isdigit(ch))

	   printf("%c is a digit\n", ch);

}

Output

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