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Function `std.ascii.isDigit`


						
				bool isDigit
				(
				

				  dchar c
				

				) pure nothrow @nogc @safe;

Parameters

Name	Description
c	The character to test.

Returns

Whether c is a digit (0 .. 9).

Example

assert( isDigit('3'));
assert( isDigit('8'));
assert(!isDigit('B'));
assert(!isDigit('#'));

// N.B.: does not return true for non-ASCII Unicode numbers
assert(!isDigit('０')); // full-width digit zero (U+FF10)
assert(!isDigit('４')); // full-width digit four (U+FF14)

Authors

Walter Bright and Jonathan M Davis

License

Boost License 1.0.