Javascript — String Sums to Literal

Question

How could I make this possible within Javascript? I have no idea where to start.

I want to be able to get a string such as var sum = "1+1-2.1*3/5"; and allow spaces too (we can strip spaces) — and then calculate it.

I've only ever done sums like this: var answer = 5+5; .

Any help would be appreciated. Thanks.

Answer 1

您可以简单地对变量使用eval进行数学运算。

eval(sum);