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# isdigit

Example: isdigit | Character Classification and Conversion Functions

Checks if a string is a decimal digit (characters `0' to `9').

    int isdigit( int c );

c | The string to check.

For isdigit details, refer to your C language documentation.

## Return Values

This function returns a non-zero value (true) if the character is a decimal digit, zero (false) if it is not.

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