If–else statement in C++ - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the purpose of an if–else statement in C++?

An if–else statement lets the program choose between two paths: one if a condition is true, and another if it is false.

beginner

Write the basic syntax of an if–else statement in C++.

if (condition) {<br> // code if condition is true<br>} else {<br> // code if condition is false<br>}

beginner

What happens if the condition in an if statement is false and there is no else block?

The program skips the if block and continues with the next code after it.

intermediate

Can you have multiple else if blocks in C++? What is their use?

Yes, multiple else if blocks let you check several conditions one after another, running the code for the first true condition.

beginner

Explain with a real-life example how if–else works.

Imagine deciding what to wear: if it is raining, wear a raincoat; else, wear a t-shirt. The if–else helps choose based on weather.

What does the else block do in an if–else statement?

A Runs code when the if condition is true

B Checks another condition

C Runs code when the if condition is false

D Ends the program

The else block runs only when the if condition is false.

Which keyword is used to check multiple conditions after an if in C++?

A elif

B elseif

C else

D else if

C++ uses 'else if' as two words to check multiple conditions.

What happens if the if condition is true and there is an else block?

A Both if and else blocks run

B Only the if block runs

C Only the else block runs

D Neither block runs

Only the if block runs when the condition is true; else block is skipped.

Which of these is a correct if statement syntax in C++?

A if (condition) { }

B if condition then { }

C if condition { }

D if: (condition) { }

The correct syntax requires parentheses around the condition.

Can an if statement exist without an else block?

A Yes, else is optional

B No, else is required

C Only if the condition is true

D Only in loops

The else block is optional; you can have just an if statement.

Describe how an if–else statement controls the flow of a program.

Think about how the program chooses what to do next based on a question.

Write a simple if–else statement in C++ that checks if a number is positive or not.

Use if (number > 0) and else blocks.