Tagged math

Arctangent in radians from + - * / only (fdlibm's method), so every language returns the same double.

Convert a rate between percent, basis points and a plain ratio exactly, as decimal text or integer basis points.

Exact integer arithmetic of any size, on decimal strings, for powers and products that overflow 64 bits.

Clamp an integer to an inclusive range, refusing a range whose bounds are the wrong way round.

e to the power x from + - * / only, so TypeScript, Python and Rust return the same double for the same input.

Raise a positive decimal to a fractional power, (1.199)^(31/365), identically in every language.

Greatest common divisor and least common multiple of two integers, exactly and without overflow.

Exact integer square root: the largest whole number whose square does not exceed n.

Natural logarithm from + - * / only, so TypeScript, Python and Rust return the same double for the same input.

Percentage change from one value to another, in basis points, with an explicit rounding mode.

base to the power exponent from + - * / only, exact by squaring for whole exponents, identical in every language.

Exact fraction arithmetic, always reduced, for rates and ratios that must not drift.

Integer division with an explicit rounding mode, for money arithmetic that must not drift.

Divide two integers of any size with an explicit rounding mode, on decimal strings, for exact money sums past 2^53.

Round a float half away from zero to 0-12 decimal places, identically in TypeScript, Python and Rust.

Sine and cosine of an angle in radians from + - * / only, so every language returns the same doubles.