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1.16 exp10, exp10f—exponential, base 10

Synopsis 

     #include <math.h>
     double exp10(double x);
     float exp10f(float x);

Description
exp10 and exp10f calculate 10 ^ x, that is, 10 raised to the power x.

You can use the (non-ANSI) function matherr to specify error handling for these functions.
Returns
On success, exp10 and exp10f return the calculated value. If the result underflows, the returned value is 0. If the result overflows, the returned value is HUGE_VAL. In either case, errno is set to ERANGE.
Portability
exp10 and exp10f are GNU extensions.