scalbn, scalbnf : scale by integer

Synopsis

#include <math.h>
double scalbn(double x, int y);
float scalbnf(float x, int y);
```### Description

scalbn and scalbnf scale x by n, returning x times 2 to the power n. The result is computed by manipulating the exponent, rather than by actually performing an exponentiation or multiplication.### Returns

x times 2 to the power n.

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**Authoritative source**: BUSMASTER DITA help source `scalbn.dita`, compiled into `BUSMASTER.CHM` with the application.