How to parseInt '+'?

Question

JavaScript

Hi all. Does anyone have any idea how to make a number out of a string ("+" ==> +)?
Is my state in React returning Math.random() > 0.5 ? ` + ` : ` - `.
Unfortunately, the operation does not take place (outputs 8 "-" 5, for example, but I would like 3).
What I tried to do:

• parseInt - 8 " - " 5,
  
• without quotes - gives a syntax error,
  
• with ` (ES6) - same result,
  
• Number - error (if Number('+') => NaN),
  
• I put both ( ) and { } in state - not that
  

Good evening everyone!

Answer 1

k = Math.random() > 0.5 ? eleven;
and replace your sum with A + k * B