bcsub()

bcsub()

function bcsub(string $num1, string $num2, ?int $scale = null): string

Subtracts two arbitrary-precision decimal numbers.

Parameters:

• $num1 (string)
• $num2 (string)
• $scale (?int), default null, optional

Returns: string

Availability

• Compiled (AOT): supported by the Elephc code generator.
• eval() (magician interpreter): supported — declarative interpreter builtin (crates/elephc-magician/src/interpreter/builtins/math/bcsub.rs).

No examples yet — check examples/ and showcases/ for usage patterns.

Internals

For how bcsub is implemented in the compiler, see the internals page.