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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
Copyright © 1999-2022 by the D Language Foundation | Page generated by ddox.