Comparison Operators

Checks if two values are equal in both value and type, returning true or false.

Part of: JavaScript Coding without HTML and CSS — Module 11, ACARA Digital Technologies Years 7–8 — Programming with Control Structures and Functions (JavaScript) — Module 26, ACARA Digital Technologies Years 9–10 — Modular and Object-Oriented Programming (JavaScript) — Module 4

Understanding Comparison Operators in JavaScript

What it does: This checks whether 10 is greater than 7. === performs a strict equality check on both value and type. !== returns true when the values or types differ. = is for assignment, not comparison - use === instead. Comparisons always produce a boolean result. The correct operator is <=, not =<. !== checks that the values or types are different. A single = assigns a value; it doesn't compare values.

Common mistakes: Use === for comparison, not =, which is for assignment. The strict inequality operator is !==, not !===.

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Free printable worksheet with full answer key — or add this module to a class and your students practise it interactively.

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This module's key terms are also in a printable crossword (Modules 11–25) and word search (Modules 1–29).

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Learning

Duo

Does === check if two values are equal in both value and type?

YesNo

Matches

console.log(5 = 5);

↓

Wrong - use === for comparison, = is for assignment

Applying

Meanings

Term

===

Meaning

Checks if two values are equal in both value and type, returning true or false.

Practice

console.log(5 === 5);

Testing

Gaps

console.log(5 5);

Check Answer

Spots

1console.log(5 = 5);

2console.log(5 === 5);

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Quick Questions

1. Does === check if two values are equal in both value and type?

A. Yes ✓

B. No

=== performs a strict equality check on both value and type.

2. Does !== check if two values are not strictly equal?

A. No

B. Yes ✓

!== returns true when the values or types differ.

3. Is = a valid way to check if two values are equal?

A. No ✓

B. Yes

= is for assignment, not comparison - use === instead.

4. Does > check if the left value is greater than the right?

A. Yes ✓

B. No

> compares two values and returns true if the left is bigger.

5. Does < check if the left value is smaller than the right?

A. No

B. Yes ✓

< compares two values and returns true if the left is smaller.

Match the Pairs

5 === 5 → Returns true because both values and types match

5 !== 3 → Returns true because the values are not equal

Compares if one value is greater than another → 10 > 7

Compares if one value is less than another → 3 < 8

console.log(5 = 5); → Wrong - use === for comparison, = is for assignment

console.log(5 !=== 3); → Wrong - the strict inequality operator is !==, not !===

Key Term

===

Checks if two values are equal in both value and type, returning true or false.

Fill in the Blanks

1. console.log(5 === 5);

Hint: Type the operator that checks strict equality.

2. console.log(5 !== 3);

Hint: Type the operator that checks strict inequality.

3. console.log(10 > 7);

Hint: Type the operator that checks if one value is greater.

4. console.log(3 < 8);

Hint: Type the operator that checks if one value is less.

5. let isEqual = age === 12;

Hint: Type the operator that checks strict equality.

Spot the Error

Question 1

A console.log(5 = 5);

B console.log(5 === 5);

C console.log(5 !== 3);

Line A — Use === for comparison, not =, which is for assignment.

Question 2

A console.log(5 !== 3);

B console.log(5 !=== 3);

C console.log(10 > 7);

Line B — The strict inequality operator is !==, not !===.

Question 3

A console.log(10 =< 7);

B console.log(10 > 7);

C console.log(3 < 8);

Line A — Use <= not =<, to check less than or equal.

Question 4

A let a = 5 === 5;

B let b = 5 => 3;

C let c = 3 < 8;

Line B — => is not a comparison operator - use >= for this check.

Question 5

A let x = 5 === 5;

B let y = 5 !== 3;

C let z = age == 12;

D let w = 10 > 7;

Line C — This module uses ===, not the loose ==, for equality checks.

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