function iterExp2( iterator ) {
	return iterMap( iterator, exp2 );
}
Returns an iterator which iteratively evaluates the base `2` exponential function.

## Notes

-   If an environment supports `Symbol.iterator` **and** a provided iterator is iterable, the returned iterator is iterable.

@param {Iterator} iterator - input iterator
@throws {TypeError} must provide an iterator protocol-compliant object
@returns {Iterator} iterator

@example
var uniform = require( '@stdlib/random/iter/uniform' );

var iter = iterExp2( uniform( -50.0, 50.0 ) );

var v = iter.next().value;
// returns <number>

v = iter.next().value;
// returns <number>

v = iter.next().value;
// returns <number>

// ...