C++ Control Flow Statements
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Questions and Answers

What is the primary purpose of conditional statements in C++?

  • To handle memory management
  • To declare variables in a program
  • To repeat a section of code multiple times
  • To alter the flow of program execution based on certain conditions (correct)

What is a characteristic of the if statement in C++?

  • It executes code only if the test expression evaluates to true. (correct)
  • It can only handle numerical test expressions.
  • It executes code even if the condition is false.
  • It requires an else clause to function.

Which of the following is NOT a branching statement in C++?

  • while (correct)
  • if
  • switch
  • nested if

What distinguishes looping from branching in programming?

<p>Looping determines how many times a certain action should be taken. (B)</p> Signup and view all the answers

In which scenario would you use a switch case statement?

<p>When you need to evaluate multiple expressions of a variable (A)</p> Signup and view all the answers

Which of the following correctly represents the syntax of an if statement in C++?

<p>if (condition) { statements; } (D)</p> Signup and view all the answers

In what scenario would using a nested if statement be appropriate?

<p>When you have a condition that leads to another decision point (C)</p> Signup and view all the answers

Which of the following loops in C++ will execute at least once regardless of the condition?

<p>do-while loop (C)</p> Signup and view all the answers

What is the primary function of the if...else statement in programming?

<p>To execute code depending on whether a test expression is true or false. (D)</p> Signup and view all the answers

Which of the following best describes a nested if...else statement?

<p>It allows multiple test expressions to be evaluated successively. (A)</p> Signup and view all the answers

In the syntax of a nested if...else statement, what happens when all test expressions evaluate to false?

<p>The statements inside the final else block will be executed. (D)</p> Signup and view all the answers

What is the correct syntax for an else if statement?

<p>else if (test expression) { statement } (B)</p> Signup and view all the answers

Which statement about the if...else structure is true?

<p>There can be multiple else if statements following a single if. (B)</p> Signup and view all the answers

How does a programmer write a condition to compare two numbers using if...else?

<p>All of the above can be used to compare two numbers. (D)</p> Signup and view all the answers

What is the correct way to write the opening statement of an if condition?

<p>if (condition) (B)</p> Signup and view all the answers

When using nested if...else statements, what is executed when the first test expression returns true?

<p>The code within the first braces following the if is executed. (A)</p> Signup and view all the answers

Flashcards

What is an if...else statement?

The if...else statement allows you to execute different blocks of code depending on whether a condition is true or false.

How does an if...else statement work?

The code inside the first set of curly braces ({}) will be executed if the 'test expression' is true. If the 'test expression' is false, the code inside the second set of curly braces ({}) will be executed.

What is a 'test expression' in an if...else statement?

A 'test expression' is a condition that evaluates to either true or false. It's often used to compare values or check if something is true or not.

What is a Nested if...else statement?

A nested if...else statement allows you to check multiple conditions within each other. If the first condition is true, its code block is executed. If the first condition is false, the program moves on to the second condition, and so on.

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Why use a nested if...else statement?

A nested if...else statement allows you to handle more complex scenarios where there are multiple conditions to check. This allows for more precise and flexible decision-making in your programs.

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if statement

A C++ statement that allows a program to execute different code blocks based on whether a given condition is true or false.

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Test expression

A 'test expression' in an if statement is a piece of code that evaluates to either true (1) or false (0). It's used to make a decision about which code to execute.

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Code block

This is the code inside an if statement that is executed only if the 'test expression' is true. The code block is enclosed in curly braces { }.

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if-else statement

A type of branching statement that allows the program to choose between two possible code paths based on the result of a 'test expression.' It's used to handle situations where you need to execute different code depending on whether a condition is true or false.

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Nested if-else

These are nested if-else statements that let you create more complex decision pathways. You put if-else statements inside other if-else statements to handle multiple conditions.

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Switch case statement

A control statement used for multi-way branching. You use 'case' labels to specify different code blocks to execute based on the value of an expression. 'break' statements are used to exit the switch statement.

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Loops

A programming technique that allows a program to repeatedly execute a block of code as long as a certain condition is met. They are used for tasks that require repetitive actions.

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for loop

They are used to execute a block of code a specific number of times. They follow a specific syntax, taking initial value, ending condition, and increment/decrement as parameters.

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Study Notes

Conditional Statements

  • C++ provides branching (if-else, switch) to alter program flow
  • Conditional statements control the order of execution based on conditions
  • if statements execute code if a condition is true
  • if-else statements execute one block if true, another if false
  • Nested if-else allows multiple conditions
  • Switch case statements allow multiple choices based on a value

Looping Statements

  • C++ provides looping mechanisms (for, while, do-while) to repeat code blocks
  • for loops repeat a block of code a specific number of times
  • while loops repeat a block as long as a condition is true
  • do-while loops execute a block at least once and repeat while a condition is true
  • The break statement exits a loop prematurely
  • The continue statement skips the rest of the current iteration and proceeds to the next one of a loop

Control Statements

  • Control statements in C++ (if, if-else, switch, for, while, do-while) alter the normal sequential flow of execution
  • These statements allow for decision making and repetition.

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Related Documents

Conditional and Looping Statements PDF

Description

Test your knowledge on control flow in C++ with this quiz focused on conditional and looping statements. You'll explore if-else structures, switch cases, and various looping mechanisms like for, while, and do-while. Perfect for anyone looking to solidify their understanding of C++ programming concepts.

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