Arithmetic operators - Cheat Sheet & Quick Revision

Recall & Review

beginner

What are arithmetic operators in C?

Arithmetic operators are symbols used to perform basic math operations like addition (+), subtraction (-), multiplication (*), division (/), and modulus (%).

beginner

What does the modulus operator (%) do in C?

The modulus operator (%) gives the remainder after dividing one number by another. For example, 7 % 3 equals 1 because 7 divided by 3 leaves a remainder of 1.

intermediate

How does integer division behave in C when using the division operator (/)?

When dividing two integers, C performs integer division, which means it divides and then drops any decimal part, returning only the whole number part.

beginner

What is the result of the expression: 5 + 3 * 2 in C?

The result is 11 because multiplication (*) has higher priority than addition (+). So, 3 * 2 = 6, then 5 + 6 = 11.

beginner

Can arithmetic operators be used with floating-point numbers in C?

Yes, arithmetic operators like +, -, *, and / can be used with floating-point numbers (like float or double) to perform math with decimals.

What is the output of the expression 10 / 4 in C when both numbers are integers?

A 2

B 2.5

C 3

D 4

Integer division drops the decimal part, so 10 / 4 equals 2.

Which operator gives the remainder of a division in C?

A %

B -

C *

D +

The modulus operator (%) returns the remainder after division.

What is the result of 8 + 2 * 5 in C?

A 20

B 18

C 50

D 30

Multiplication happens first: 2 * 5 = 10, then 8 + 10 = 18.

Which operator is used for multiplication in C?

A /

B -

C %

D *

The asterisk (*) is the multiplication operator.

Can you use arithmetic operators with float variables in C?

A No, only integers

B Only + and -

C Yes, for +, -, *, /

D Only * and /

Arithmetic operators +, -, *, and / work with float and double types.

Explain how the division operator (/) works differently with integers and floating-point numbers in C.

Think about dividing 7 by 2 as int and float.

Describe the order of operations when using multiple arithmetic operators in a single expression in C.

Remember PEMDAS or operator precedence.