C ctype isdigit() Function
Example
Check if a character is a digit:
char c = '8';
if (isdigit(c)) {
printf("%c is a digit", c);
} else {
printf("%c is not a digit", c);
}
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Definition and Usage
The isdigit()
function returns a non-zero value (equivalent to boolean true) if the
character is a digit.
The isdigit()
function is defined in the <ctype.h>
header file.
Syntax
int isdigit(int c);
Parameter Values
Parameter | Description |
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c | Required. The ASCII value of a character or an actual character |
Technical Details
Returns: | An int value which is non-zero (equivalent to boolean true) if the character is a decimal digit.Otherwise it returns 0 (equivalent to boolean false). |
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