Why operators are needed in Javascript - See It in Action

Why Operators Are Needed

📖 Scenario: Imagine you have some numbers and words, and you want to combine or compare them. Operators help you do this easily, like adding prices or checking if two things are the same.

🎯 Goal: You will create simple examples using operators to add numbers, join words, and compare values. This will show why operators are useful in programming.

📋 What You'll Learn

Create two number variables with exact values

Create two string variables with exact values

Use the addition operator to add the two numbers

Use the concatenation operator to join the two strings

Use the equality operator to compare the two numbers

💡 Why This Matters

🌍 Real World

Operators are used in everyday programming to calculate totals, combine text, and make decisions.

💼 Career

Understanding operators is essential for any programming job because they are the building blocks of logic and calculations.

1

Create number variables

Create two variables called num1 and num2 with values 10 and 5 respectively.

Javascript

// Create two number variables num1 and num2 with values 10 and 5
// Your code here

Need a hint?

Use const to create variables and assign the numbers 10 and 5.

2

Create string variables

Create two variables called str1 and str2 with values 'Hello' and 'World' respectively.

Javascript

const num1 = 10;
const num2 = 5;
// Create two string variables str1 and str2 with values 'Hello' and 'World'
// Your code here

Need a hint?

Use single quotes to create string variables.

3

Add numbers using + operator

Create a variable called sum that adds num1 and num2 using the + operator.

Javascript

const num1 = 10;
const num2 = 5;
const str1 = 'Hello';
const str2 = 'World';
// Create sum by adding num1 and num2
// Your code here

Need a hint?

Use the plus sign + to add numbers.

4

Join strings and compare numbers

Create a variable called greeting that joins str1 and str2 with a space using the + operator. Then create a variable called isEqual that checks if num1 is equal to num2 using the === operator. Finally, print sum, greeting, and isEqual.

Javascript

const num1 = 10;
const num2 = 5;
const str1 = 'Hello';
const str2 = 'World';
const sum = num1 + num2;
// Create greeting by joining str1 and str2 with a space
// Create isEqual by comparing num1 and num2 with ===
// Print sum, greeting, and isEqual
// Your code here

Need a hint?

Use + to join strings with a space. Use === to compare numbers. Use console.log() to print.