Assignment operators in Rust - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

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

Rust

let mut x = 10;
x [1] 5;
println!("{}", x);

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.

Forgetting to make the variable mutable with 'mut'.

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

2fill in blank

medium

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

Rust

let mut y = 4;
y [1] 3;
println!("{}", y);

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

A-=

B/=

C+=

D*=

Attempts:

3 left

💡 Hint

Common Mistakes

Using '+=' or '-=' instead of '*=' changes the operation.

Not declaring the variable as mutable.

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

3fill in blank

hard

Fix the error in the code by choosing the correct assignment operator to divide z by 2.

Rust

let mut z = 20;
z [1] 2;
println!("{}", z);

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

A+=

B*=

C/=

D-=

Attempts:

3 left

💡 Hint

Common Mistakes

Using '*=' multiplies instead of dividing.

Using '+=' or '-=' changes the operation.

The '/=' operator divides the variable by the right value and assigns the result back to it.

4fill in blank

hard

Fill both blanks to subtract 7 from a and then add 10 to b using assignment operators.

Rust

let mut a = 15;
let mut b = 5;
a [1] 7;
b [2] 10;
println!("{} {}", a, b);

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

A-=

B+=

C*=

D/=

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up '+' and '-' operators.

Using '*=' or '/=' instead of addition or subtraction.

Use '-=' to subtract from 'a' and '+=' to add to 'b'.

5fill in blank

hard

Fill all three blanks to multiply m by 4, divide n by 2, and add 3 to p using assignment operators.

Rust

let mut m = 3;
let mut n = 8;
let mut p = 1;
m [1] 4;
n [2] 2;
p [3] 3;
println!("{} {} {}", m, n, p);

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

A+=

B/=

D*=

Attempts:

3 left

💡 Hint

Common Mistakes

Confusing the order of operators.

Using the wrong operator for the intended operation.

Use '*=' to multiply 'm', '/=' to divide 'n', and '+=' to add to 'p'.