← Back to Roadmap

Comparison Operators

Easy

In plain terms

Comparison operators return true or false. Use === and !== for strict equality (no type coercion). Avoid == and != which coerce types and can cause subtle bugs.

What you need to know

  • •=== and !== (strict, preferred)
  • •== and != (loose, avoid)
  • •>, <, >=, <=

Try it yourself

Copy the code below and run it in your browser console or a code editor:

5 === 5;   // true
5 === '5';  // false (strict - no coercion)
5 == '5';   // true (loose - coerces!)

null === undefined;  // false
null == undefined;   // true

5 > 3;   // true
5 >= 5;  // true
3 < 5;   // true

Learn more

Dive deeper with these trusted resources:

MDNjavascript.infoTutorialsPointW3Schools