(This is the documentation for SDL3, which is the current stable version. SDL2 was the previous version!)

SDL_scalbn

Scale x by an integer power of two.

Header File

Defined in <SDL3/SDL_stdinc.h>

Syntax

double SDL_scalbn(double x, int n);

Function Parameters

double	x	floating point value to be scaled.
int	n	integer exponent.

Return Value

(double) Returns x * 2^n.

Remarks

Multiplies x by the nth power of the floating point radix (always 2).

Domain: -INF <= x <= INF, n integer

Range: -INF <= y <= INF

This function operates on double-precision floating point values, use SDL_scalbnf for single-precision floats.

Thread Safety

It is safe to call this function from any thread.

Version

This function is available since SDL 3.1.3.

See Also

• SDL_scalbnf
• SDL_pow

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CategoryAPI, CategoryAPIFunction, CategoryStdinc

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