Conditionals: Comparison operators

After the assignment and arithmetic operators, the third set of operators I want to introduce is comparison operators.

They are one of the most important operators category in JavaScript.

Comparison operators always returns a boolean, a value that’s true or false, and they are divided in 2 groups: equality operators , and disequality comparison operators.

These are equality operators:

  • === checks for equality
  • !== checks for inequality

These are disequality comparison operators:

  • < means “less than”
  • <= means “less than, or equal to”
  • > means “greater than”
  • >= means “greater than, or equal to”

You can use them to compare two numbers, or two strings.

Note that we also have == and != in JavaScript, but I highly suggest to only use === and !== because they can prevent some subtle problems.

Lessons in this unit:

0: Introduction
1: ▶︎ Comparison operators
2: `if` statements
3: How to use `else`
4: `switch`
5: The ternary operator
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