Getting Started
Level 1
- 4 - Comments
- 5 - Displaying Text
- 6 - Variables - Let
- 7 - Variables - Constants
- 8 - Arithmetic Operators
- 9 - Functions
- 10 - If/Else Statements
- 11 - Comparison Operators
- 12 - If/Else Loops
- 13 - Boolean Operators
- 14 - Level 1 Complete!
Level 2
Level 3
Useful Links
Step 8 - Arithmetic Operators
There are a bunch of different ‘operators’ in programming. Let’s have a look through arithmetical operators now. JavaScript includes several standard arithmetical operators (+, -, /, *) that you can use to do maths with your numbers.
const sumOfNumbers = 1 + 3;
console.log(sumOfNumbers);
This will print the number 4 in our console.
Tip:
Note how we didn’t put 1 and 3 in quotes, because they are numbers.
Challenge:
Create 3 variables:
- 1st variable named ten with value 10
- 2nd variable named three with value 3
- And finally 3rd variable named multipleOfNumbers that will be equal to the 1st variable multiplied by the 2nd variable.
Answer
const ten = 10;
const three = 3;
const multipleOfNumbers = ten * three
Challenge:
Display the value of multipleOfNumbers.
Answer
const ten = 10;
const three = 3;
const multipleOfNumbers = ten * three
console.log(multipleOfNumbers)
Tip:
One operator not often covered is the modulo - %. This calculates the
remainder when one number is divided by the other. For example, 7 % 3 = 1
as 7 can be divided by 3 twice with 1 remainder.