Operator precedence in C++ - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is operator precedence in C++?

Operator precedence determines the order in which operators are evaluated in an expression. Operators with higher precedence are evaluated before those with lower precedence.

beginner

Which operator has higher precedence: multiplication (*) or addition (+)?

Multiplication (*) has higher precedence than addition (+), so it is evaluated first in an expression without parentheses.

beginner

How does parentheses affect operator precedence?

Parentheses have the highest precedence and force the expression inside them to be evaluated first, regardless of other operators.

intermediate

What is the precedence order between logical AND (&&) and logical OR (||)?

Logical AND (&&) has higher precedence than logical OR (||), so && operations are evaluated before || in expressions.

intermediate

In the expression 3 + 4 * 2 / (1 - 5), which operation is performed first?

The operation inside parentheses (1 - 5) is performed first because parentheses have the highest precedence.

Which operator is evaluated first in the expression 5 + 3 * 2?

A Depends on compiler

B Addition (+)

C Both at the same time

D Multiplication (*)

Multiplication (*) has higher precedence than addition (+), so it is evaluated first.

What does parentheses do in an expression?

A Force evaluation order inside them first

B Decrease operator precedence

C Increase operator precedence

D Have no effect

Parentheses force the expression inside them to be evaluated first, regardless of other operators.

Which has higher precedence: logical AND (&&) or logical OR (||)?

A Logical OR (||)

B Logical AND (&&)

C They have the same precedence

D Depends on the expression

Logical AND (&&) has higher precedence than logical OR (||).

In the expression a = b == c + d, which operator is evaluated last?

A Assignment (=)

B Equality (==)

C Addition (+)

D All evaluated simultaneously

Assignment (=) has the lowest precedence and is evaluated last.

What is the result of 2 + 3 * 4?

A 20

B Undefined

C 14

D 24

Multiplication is done first: 3 * 4 = 12, then addition: 2 + 12 = 14.

Explain how operator precedence affects the evaluation of the expression 4 + 5 * 6.

Think about which operator is stronger.

Describe the role of parentheses in changing the order of operations in expressions.

Parentheses act like a priority sign.