Statements and semicolons
Name:
Date:
Class:
A
Quick Questions
Shade in the A or B circle for each question.
1. Which line is one complete JavaScript statement?
2. What usually goes at the end of a JavaScript statement?
3. Which is the better way to write two statements?
4. How many statements are in this line? console.log('Hi');
5. Which one is a block of code rather than a single statement?
B
Match the Pairs
Draw a line connecting each item on the left to its match on the right.
| Left column | Right column | |
|---|---|---|
| 1let score = 0; | AThree statements are squashed onto one line. Put one statement per line so the code is easier to read. | |
| 2console.log(score); | BOne statement: a single instruction on its own line, ended with a semicolon | |
| 3Write one statement per line, with a semicolon at the end of each | Clet lives = 3; lives = lives - 1; | |
| 4A block in curly braces holds statements, and each statement inside still ends with a semicolon | DThe first statement is missing its semicolon at the end. It should be let points = 5; | |
| 5let name = "Sam"; let age = 13; console.log(name); | Eif (score > 10) { console.log("Win"); } | |
| 6let points = 5 console.log(points); | FA separate statement that shows the value of score in the console |
C
Definitions
let score = 0;
D
Fill in the Blanks
Complete each line of code by filling in the missing parts.
1.
___ score = 0;
2.
let lives = 3;
console.log(_____);
3.
let a = 5;
let b = 7;
let total = a _ b;
4.
if (score > 5) {
___________("You win!");
}
5.
let total = 0;
total __ 5;
console.log(total);
E
Spot the Error
Shade in the letter of the line that contains an error.
Question 1
A
let name = "Sam";
B
let age = 13
C
console.log(name, age);
Question 2
A
let score = 0;
B
score = score + 5:
C
console.log(score);
Question 3
A
let a = 4;
B
let b = 6;
C
let total = a + b;
D
console.log(total),
Question 4
A
let a = 1;
B
let b = 2;
C
console.log(a);
D
console.log(b;)
Question 5
A
let temp = 30;
B
if (temp > 25) {
C
console.log("Hot")
D
}
Answer Key
Statements and semicolons
Section A: Quick Questions
Q1
B — let score = 0;
Q2
A — A semicolon (;)
Q3
A — let a = 1;
let b = 2;
Q4
B — One statement
Q5
A — if (x > 5) {
console.log(x);
}
Section B: Match the Pairs
Q1
let score = 0; → One statement: a single instruction on its own line, ended with a semicolon
Q2
console.log(score); → A separate statement that shows the value of score in the console
Q3
Write one statement per line, with a semicolon at the end of each → let lives = 3;
lives = lives - 1;
Q4
A block in curly braces holds statements, and each statement inside still ends with a semicolon → if (score > 10) {
console.log("Win");
}
Q5
let name = "Sam"; let age = 13; console.log(name); → Three statements are squashed onto one line. Put one statement per line so the code is easier to read.
Q6
let points = 5
console.log(points); → The first statement is missing its semicolon at the end. It should be let points = 5;
Section C: Definitions
Q1
let score = 0; — A statement is one instruction in JavaScript, usually written on its own line and ended with a semicolon (;). This line is one statement.Section D: Fill in the Blanks
Q1
let score = 0;Q2
let lives = 3;
console.log(lives);Q3
let a = 5;
let b = 7;
let total = a + b;Q4
if (score > 5) {
console.log("You win!");
}Q5
let total = 0;
total += 5;
console.log(total);Section E: Spot the Error
Q1
B — The statement 'let age = 13' has no semicolon at the end. Each statement should finish with a semicolon: let age = 13;
Q2
B — The statement ends with a colon (:) instead of a semicolon (;). It should be score = score + 5;
Q3
D — A comma does not end a statement. The line must end with a semicolon: console.log(total);
Q4
D — The semicolon is inside the brackets, so the call is broken. The semicolon goes after the closing bracket: console.log(b);
Q5
C — The statement inside the block is missing its semicolon. Each statement in a block still needs one: console.log("Hot");