How to return a value from one method and get it in another?

Question

JavaScript

Hey!
I just realized the truth that by setting variables globally I waste memory. Therefore, I am looking for a way without setting a variable globally to get its value in any of the methods.
Thus:
How can I get the value from a method checkMinMax()in a method iterator()without setting variables globally?
Code on codepan
Thank you all!

Answer 1

class foo {
  method1() {
     return 'hello' // return вы и сами написали
  }
  method2() {
     let x = this.method1() // а вот результат никуда не присвоили
     console.log(x)
  }
}