Can't cleanly break out of the for loop in javascript

Can't cleanly break out of the for loop in javascript

Got this simple example:

Got this simple example:

const arr = [
  {name: 'first', amount: 2},
  {name: 'second', amount: 1},
  {name: 'third', amount: 1}
]
const obj = {name: 'second', amount: 3}

for (let i = 0; i < arr.length; i++) { if (arr[i].name === obj.name) { arr[i].amount += obj.amount; break; } else { arr.push(obj) } }

I want to execute the ordinary for loop and the desired result is that if there's an object with the same name as in the array, then just add up the amount, else I want obj to be pushed to the list. But in fact both events happen. How to make so when I break out from if statement the else statement won't run?

javascript arrays loops

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