Arithmetic operators in Java - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to add two numbers and print the result.

Java

int a = 5;
int b = 3;
int sum = a [1] b;
System.out.println(sum);

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 the numbers.

Using '*' or '/' will multiply or divide, not add.

The + operator adds two numbers together.

2fill in blank

medium

Complete the code to multiply two numbers and print the result.

Java

int x = 4;
int y = 7;
int product = x [1] y;
System.out.println(product);

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 '/' will divide instead of multiply.

The * operator multiplies two numbers.

3fill in blank

hard

Fix the error in the code to correctly divide two numbers and print the result.

Java

int numerator = 10;
int denominator = 2;
int result = numerator [1] denominator;
System.out.println(result);

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

A/

B-

C+

D*

Attempts:

3 left

💡 Hint

Common Mistakes

Using '-' will subtract instead of divide.

Using '*' will multiply instead of divide.

The / operator divides the numerator by the denominator.

4fill in blank

hard

Fill both blanks to calculate the remainder of division and print it.

Java

int dividend = 17;
int divisor = 5;
int remainder = dividend [1] divisor;
System.out.println(remainder [2] 2);

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

A%

B+

C-

D*

Attempts:

3 left

💡 Hint

Common Mistakes

Using '/' instead of '%' will give the quotient, not remainder.

Using '-' or '*' in the second blank will not add 2.

The % operator gives the remainder of division. The + operator adds 2 to the remainder.

5fill in blank

hard

Fill all three blanks to create a map of numbers to their squares for numbers greater than 3.

Java

Map<Integer, Integer> squares = new HashMap<>();
for (int num = 1; num <= 5; num++) {
    if (num [1] 3) {
        squares.put(num, num [2] num);
    }
}
System.out.println(squares[3]);

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

A>

B*

C.toString()

D<

Attempts:

3 left

💡 Hint

Common Mistakes

Using '<' instead of '>' will filter wrong numbers.

Using '+' instead of '*' will not square the number.

Printing the map without converting to string may not show expected output.

The operator > checks if the number is greater than 3. The * operator squares the number. The .toString() method converts the map to a string for printing.