Math Expression Evaluator

No. It uses a custom parser with separate expression, term, power, unary, postfix, and primary parsing steps. That means it only supports the operators and functions explicitly coded into the parser.

Because the trig functions come straight from JavaScript's Math object, which uses radians. For 90 degrees, use sin(pi/2) instead.

The parser handles +, -, *, /, %, ^, parentheses, unary +/-, postfix factorial, constants pi and e, and single-argument functions sqrt, abs, floor, ceil, round, sin, cos, tan, log, and exp. Anything outside that list is rejected as an unknown function or token.

This parser does not implement implicit multiplication or scientific-notation numbers. You need to write 2*(3+4), and exponent notation like 1e3 isn't recognized by its number parser.

Because factorial is deliberately limited to non-negative integers. If the value isn't an integer or is below zero, the tool throws a specific factorial error instead of approximating it.