How to set variable min and max value in Flutter

Question

ISSUE

I am using a variable called var addedToCart = 0; . How to set a max and min value so that user cannot click more or less than the specified value and var addedToCart will not store the out of range value?

I want

When + icon clicked add value to addedToCart
When - icon clicked subtract value from addedToCart
but within specified range

Answer 1

You can simply use if statement

var MIN = 0;
...
if(value > MIN){
  setState({
    addedToCart--;
  })
}

...

if(value < MAX){
  setState({
    addedToCart++;
  })
}