Jeb Nicholson Jeb Nicholson - 5 months ago 42
Swift Question

How do I turn a string into a maths equation?

A user will give me a string as their input, which will be a maths equation. E.g. (21 + 3) / 4.

I want to turn that string into a double that is equal to the answer (6.0) Is there any way to do this in swift 3, XCode 8?


You can see if NSExpression will suit your task. It’s a bit more limited than a full math expression parser but it’ll still cover even slightly complicated tasks:

Apple reference for NSExpression

Evaluating Expressions in iOS with Objective-C and Swift