pow Exponential expression &reftitle.description; numberpow numberbase numberexp Returns base raised to the power of exp. &reftitle.parameters; base The base to use exp The exponent &reftitle.returnvalues; base raised to the power of exp. If both arguments are non-negative integers and the result can be represented as an integer, the result will be returned with integer type, otherwise it will be returned as a float. &reftitle.changelog; &Version; &Description; 4.2.0 No warning is emitted on errors, even if the value can't be computed. 4.0.6 The function will now return integer results if possible, before this it always returned a float result. For older versions, you may receive a bogus result for complex numbers. &reftitle.examples; 4.0.6 NAN echo pow(-1, 5.5); // PHP <=4.0.6 1.#IND ?> ]]> &reftitle.notes; This function will convert all input to a number, even non-scalar values, which could lead to weird results. &reftitle.seealso; exp sqrt bcpow gmp_pow