Assignment operators in Javascript - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to add 5 to the variable num using an assignment operator.

Javascript

let num = 10;
num [1] 5;

Drag options to blanks, or click blank then click option'

A/=

B*=

C+=

D-=

Attempts:

3 left

💡 Hint

Common Mistakes

Using '-' instead of '+=' will subtract instead of add.

Using '*' or '/' will multiply or divide instead of adding.

The '+=' operator adds the value on the right to the variable on the left and assigns the result back to the variable.

2fill in blank

medium

Complete the code to multiply count by 3 using an assignment operator.

Javascript

let count = 4;
count [1] 3;

Drag options to blanks, or click blank then click option'

A+=

B*=

C-=

D/=

Attempts:

3 left

💡 Hint

Common Mistakes

Using '+=' will add instead of multiply.

Using '-=' or '/=' will subtract or divide instead of multiply.

The '*=' operator multiplies the variable by the value on the right and assigns the result back to the variable.

3fill in blank

hard

Fix the error in the code to subtract 2 from score using an assignment operator.

Javascript

let score = 15;
score [1] 2;

Drag options to blanks, or click blank then click option'

A-=

B*=

C+=

D/=

Attempts:

3 left

💡 Hint

Common Mistakes

Using '+=' will add instead of subtract.

Using '*=' or '/=' will multiply or divide instead of subtract.

The '-=' operator subtracts the value on the right from the variable and assigns the result back to the variable.

4fill in blank

hard

Fill both blanks to divide total by 4 and assign the result back to total.

Javascript

let total = 20;
total [1] [2];

Drag options to blanks, or click blank then click option'

A/=

B+=

C4

D2

Attempts:

3 left

💡 Hint

Common Mistakes

Using '+=' instead of '/=' will add instead of divide.

Using 2 instead of 4 will divide by the wrong number.

The '/=' operator divides the variable by the value on the right and assigns the result back. We divide by 4 here.

5fill in blank

hard

Fill all three blanks to increase value by 10, then multiply by 2, and finally subtract 5 using assignment operators.

Javascript

let value = 5;
value [1] 10;
value [2] 2;
value [3] 5;

Drag options to blanks, or click blank then click option'

A+=

B*=

C-=

D/=

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up the order of operators.

Using '/=' instead of '*=' or '-='.

First, '+=' adds 10 to value. Then '*=' multiplies value by 2. Finally, '-=' subtracts 5 from value.