Comparison operators: !==, <, >, <= and >=
Name:
Date:
Class:
A
Quick Questions
Shade in the A or B circle for each question.
1. What does 50 >= 50 give?
2. What does 50 > 50 give?
3. Which expression checks that score is NOT equal to 10?
4. let age = 12; What does age < 13 give?
5. A ride needs a height of at least 140. Which test is correct for the height variable?
B
Match the Pairs
Draw a line connecting each item on the left to its match on the right.
| Left column | Right column | |
|---|---|---|
| 1score !== 0 | AChecks that score is not equal to 0, giving true when score is any other value | |
| 2age >= 13 | Bpoints <= 100 | |
| 3The boundary value is not included when you use > on its own, so 50 > 50 is false | Cconsole.log(50 > 50); | |
| 4Comparing a variable with a number to check it is at most 100 | D=> is not a comparison operator. Greater than or equal to must be written >= with the > first. | |
| 5if (lives =! 0) { | ETrue when age is 13 or more, so 13 itself counts | |
| 6if (mark => 50) { | FThe symbols are in the wrong order and use only one equals sign. Not equal is written !==, and =! is not a comparison. |
C
Definitions
!== < > <= >=
D
Fill in the Blanks
Complete each line of code by filling in the missing parts.
1.
console.log(50 __ 50);
2.
console.log(50 _ 50);
3.
let score = 42;
console.log(score ___ 50);
4.
let age = 13;
console.log(age _ 18);
5.
let lives = 3;
console.log(lives __ 3);
E
Spot the Error
Shade in the letter of the line that contains an error.
Question 1
A
let score = 50;
B
// 50 or more passes
C
let pass = score > 50;
D
console.log(pass);
Question 2
A
let lives = 3;
B
let alive = lives =! 0;
C
console.log(alive);
Question 3
A
let temp = 35;
B
if (temp => 30) {
C
console.log("Hot");
D
}
Question 4
A
let diff = 7 <> 8;
B
console.log(diff);
C
console.log(7 < 5);
Question 5
A
let age = 16;
B
let msg = "Too young";
C
if (age = 16) {
D
msg = "Can drive";
E
}
Answer Key
Comparison operators: !==, <, >, <= and >=
Section A: Quick Questions
Q1
B — true
Q2
A — false
Q3
A — score !== 10
Q4
B — true
Q5
A — height >= 140
Section B: Match the Pairs
Q1
score !== 0 → Checks that score is not equal to 0, giving true when score is any other value
Q2
age >= 13 → True when age is 13 or more, so 13 itself counts
Q3
The boundary value is not included when you use > on its own, so 50 > 50 is false → console.log(50 > 50);
Q4
Comparing a variable with a number to check it is at most 100 → points <= 100
Q5
if (lives =! 0) { → The symbols are in the wrong order and use only one equals sign. Not equal is written !==, and =! is not a comparison.
Q6
if (mark => 50) { → => is not a comparison operator. Greater than or equal to must be written >= with the > first.
Section C: Definitions
Q1
!== < > <= >= — Comparison operators: !== checks two values are not equal, while <, >, <= and >= compare size. Each gives true or false. 50 >= 50 is true, but 50 > 50 is false.Section D: Fill in the Blanks
Q1
console.log(50 >= 50);Q2
console.log(50 > 50);Q3
let score = 42;
console.log(score !== 50);Q4
let age = 13;
console.log(age < 18);Q5
let lives = 3;
console.log(lives <= 3);Section E: Spot the Error
Q1
C — The comment says 50 or more passes, but score > 50 is false when score is exactly 50. It should be score >= 50.
Q2
B — The not equal operator is written !== with the ! first. =! is not a valid comparison operator. It should be lives !== 0.
Q3
B — => is not a comparison operator. 'Greater than or equal to' is written >= with the > first. It should be temp >= 30.
Q4
A — JavaScript has no <> operator. Not equal is written !==. It should be 7 !== 8.
Q5
C — A single = assigns a value, it does not compare. To check whether age is 16 or more, use >=. It should be age >= 16.