is_infinite Finds whether a value is infinite &reftitle.description; boolis_infinite floatval Returns &true; if val is infinite (positive or negative), like the result of log(0) or any value too big to fit into a float on this platform. &reftitle.parameters; val The value to check &reftitle.returnvalues; &true; if val is infinite, else &false;. &reftitle.seealso; is_finite is_nan