Iteration Popcorn Hacks

Iterations Popcorn Hacks

• • 1 min read

CSSE JavaScript Fundamentals

Popcorn Hacks on Iterations in JavaScript

Instructions:
Complete the exercises below in JavaScript.
You can run and test your code in a JavaScript environment.

Exercise 1: Counting with a For Loop

Write a JavaScript for loop that prints all numbers from 1 to 10.
Example:
Output:
1
2
3
…
9
10
%%js

for (let number = 1; number <11; number ++){
    console.log(number) //logs numbers up to (not including) 11
}

<IPython.core.display.Javascript object>

Exercise 2: Sum of Numbers

Write a for loop in JavaScript to calculate the sum of all numbers from 1 to n using a loop.
Example:
Input: 5
Output: 15 (because 1 + 2 + 3 + 4 + 5 = 15)
%%js
let input = 2491; //input variable. Function adapts to input. input = n here.
let total = 0;
for (let i = 1; i <= input; i++){
    total += i;
}
console.log(total);// logs total, which is incremented above

<IPython.core.display.Javascript object>

Exercise 3: Looping through Arrays

Write a JavaScript program to iterate through an array of names and print each name.
%%js
const epicPeople = ['West', 'Eggban', 'Nigil', 'Dumb Mist', 'Tanisha', 'Rachit', 'Ishan', 'Andrew']; //array with cool ppl
for (let i = 0; i < epicPeople.length; i++){ //go through array one by one
    console.log(epicPeople[i]); //log every one
}


<IPython.core.display.Javascript object>

%%js
const epicPeople = ['West', 'Eggban', 'Nigil', 'Dumb Mist', 'Tanisha', 'Rachit', 'Ishan', 'Andrew'];
for (let person of epicPeople){
    console.log(person); //alternative method
}

<IPython.core.display.Javascript object>