checkedSub (Function)

Signature: checkedSub(a: int, b: int) -> Result<int, Error>

Description: Integer subtraction that reports overflow instead of wrapping, returning Result<int, MathError>. The guarded sibling of -.

Parameters

• a (int): The minuend
• b (int): The subtrahend

Returns: Result<int, Error>

Example

let d = checkedSub(a: 10, b: 4) ?: 0  // 6

d = checkedSub (a: 10, b: 4) ?: 0  // 6