View source code
Display the source code in std/math/rounding.d from which this page was generated on github.
Report a bug
If you spot a problem with this page, click here to create a Bugzilla issue.
Improve this page
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.

Module std.math.rounding

This is a submodule of std.math.

It contains several functions for rounding floating point numbers.

Functions

NameDescription
ceil(x) Returns the value of x rounded upward to the next integer (toward positive infinity).
floor(x) Returns the value of x rounded downward to the next integer (toward negative infinity).
lrint(x) Rounds x to the nearest integer value, using the current rounding mode.
lround(x) Return the value of x rounded to the nearest integer.
nearbyint(x) Rounds x to the nearest integer value, using the current rounding mode.
quantize(val, unit) Round val to a multiple of unit. rfunc specifies the rounding function to use; by default this is rint, which uses the current rounding mode.
quantize(val, exp) Round val to a multiple of pow(base, exp). rfunc specifies the rounding function to use; by default this is rint, which uses the current rounding mode.
rint(x) Rounds x to the nearest integer value, using the current rounding mode.
rndtol(x) Returns x rounded to a long value using the current rounding mode. If the integer value of x is greater than long.max, the result is indeterminate.
round(x) Return the value of x rounded to the nearest integer. If the fractional part of x is exactly 0.5, the return value is rounded away from zero.
trunc(x) Returns the integer portion of x, dropping the fractional portion. This is also known as "chop" rounding. pure on all platforms.

Authors

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

License

Boost License 1.0.