Basic JavaScript - Iterate Through an Array with a For Loop

JavaScript
1

Tell us what’s happening:
Describe your issue in detail here.
I’m trying to solve this, but it didn’t return 20. what shall I do?
Your code so far

// Setup
const myArr = [2, 3, 4, 5, 6];

// Only change code below this line
for (let total = 0; total < myArr.length; total++) {
myArr[0] + myArr[1] + myArr[2] + myArr[3] + myArr[4];
}

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Challenge: Basic JavaScript - Iterate Through an Array with a For Loop

Link to the challenge:

2

I slightly modified your code and tested it:

const myArr = [2, 3, 4, 5, 6];

// Only change code below this line
for (let total = 0; total < myArr.length; total++) {
myArr[0] + myArr[1] + myArr[2] + myArr[3] + myArr[4];
console.log(total) //I added this line to see what's going on on the each loop step
}

//Output:
/*
0
1
2
3
4
*/

You need to accumulate result in the total variable, but obviously it is not happening.
Maybe we don’t need total here in the line below?

for (let total = 0; total < myArr.length; total++)
3

The instruction says initialize total as 0

4

You don’t initialized the total in the loop head. Look at the example. You initialize the index variable in the loop head.

5

Line inside the loop also is not right. What do you think this line is doing?

1 Like
6

It adds items in the array

7

No.

the line above is the sum of 5 elements of myArr

I am not sure you need to use such line of code inside the loop.

Also, even if you’re getting this sum… You didn’t assigned it to any variable, or I could say, you didn’t use it in your code at all

8

I’ve figured out that instead of using myArr[0] + myArr[1] + myArr[2] + myArr[3] + myArr[4]; i can use total = 0;
total += myArr [i];

9

Yeah, that looks good. So you passed the tests? If no, post your new code and feel free to ask questions if you have any.

10

yeah, I passed the test,10x a lot, I appreciate it

11

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