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# std::exp2

From cppreference.com
< cpp‎ | numeric‎ | math

Defined in header `<cmath>` |  |
double exp2( double n ); |  | (since C++11)
float exp2( float n ); |  | (since C++11)
long double exp2( long double n ); |  | (since C++11)
double exp2( Integral n ); |  | (since C++11)

Computes 2 raised to the given power `n`

### [edit] Parameters

n | - | value of floating-point or Integral type

### [edit] Return value

2 raised to the `n` (i.e. `2n`)

If the result is too large for the underlying type, range error occurs and HUGE_VAL is returned.

### [edit] See also

exp | returns e raised to the given power (ex) (function) [edit]
log2 (C++11) | base 2 logarithm of the given number (function) [edit]
log | computes natural (base e) logarithm (to base e) (ln(x)) (function) [edit]
pow | raises a number to the given power (xy) (function) [edit]
C documentation for exp2

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