Display the source code in std/math/rounding.d from which this page was generated on github.

If you spot a problem with this page, click here to create a Bugzilla issue.

Quickly fork, edit online, and submit a pull request for this page. Requires a signed-in GitHub account. This works well for small changes. If you'd like to make larger changes you may want to consider using local clone.

Function `std.math.rounding.ceil`

Returns the value of x rounded upward to the next integer (toward positive infinity).


						
				real ceil
				(
				

				  real x
				

				) pure nothrow @nogc @trusted;
				

				

				double ceil
				(
				

				  double x
				

				) pure nothrow @nogc @trusted;
				

				

				float ceil
				(
				

				  float x
				

				) pure nothrow @nogc @trusted;

Example

import std.math.traits : isNaN;

writeln(ceil(+123.456L)); // +124
writeln(ceil(-123.456L)); // -123
writeln(ceil(-1.234L)); // -1
writeln(ceil(-0.123L)); // 0
writeln(ceil(0.0L)); // 0
writeln(ceil(+0.123L)); // 1
writeln(ceil(+1.234L)); // 2
writeln(ceil(real.infinity)); // real.infinity
assert(isNaN(ceil(real.nan)));
assert(isNaN(ceil(real.init)));

Authors

Walter Bright, Don Clugston, Conversion of CEPHES math library to D by Iain Buclaw and David Nadlinger

License

Boost License 1.0.