Function only returning value at zero index

Question

So, I am learning functions and trying to create a function which takes an array as a parameter.

function printArray(arr){
    for (let i = 0; i < arr.length; i++){
        let upperCased = arr[i].toUpperCase();
        return upperCased;
    };
}
const testArray = ['o', 'p'];
printArray(testArray);

However, it returns only the first value 'O'

remove the return statement and instead put ``console.log(upperCased)`` — El Pandario, May 03 '22 at 15:03

score 0 · Answer 1 · answered May 03 '22 at 15:02

0

A return statement only gets executed once, then you exit the function.

answered May 03 '22 at 15:02

Dennis Kozevnikoff

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score 0 · Answer 2 · answered May 03 '22 at 15:03

You need to update the element on each iteration and, once the loop is complete, return the updated array.

function printArray(arr) {
  for (let i = 0; i < arr.length; i++) {
    arr[i] = arr[i].toUpperCase();
  }
  return arr;
}

const testArray = ['o', 'p', 'Bob from accounting'];

console.log(printArray(testArray));

Function only returning value at zero index

2 Answers2