Basic JavaScript - Understanding Undefined Value returned from a Function - 1glMhH5VEjR8nal9Pq2c7

Tell us what’s happening:
Describe your issue in detail here.

   **Your code so far**
// Setup
let sum = 0;

function addThree() {
 sum = sum + 3;
}

// Only change code below this line


// Only change code above this line

addThree();
function addFive(){
sum+=5;
}
   **Your browser information:**

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/102.0.5005.115 Safari/537.36 OPR/88.0.4412.74

Challenge: Basic JavaScript - Understanding Undefined Value returned from a Function

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