Podcast
Questions and Answers
What is the primary function of an if statement in programming?
What is the primary function of an if statement in programming?
- To execute a block of code based on whether a condition is true. (correct)
- To declare a variable.
- To define a function.
- To repeat a block of code.
Consider the following code snippet:
if (x > 5) { // Code block A } else { // Code block B }
Under what condition will Code block B be executed?
Consider the following code snippet:
if (x > 5) { // Code block A } else { // Code block B }
Under what condition will Code block B be executed?
- When `x` is less than 5.
- When `x` is not greater than 5. (correct)
- When `x` is greater than 5.
- When `x` is equal to 5.
Which statement allows you to check multiple conditions in a sequence?
Which statement allows you to check multiple conditions in a sequence?
- `else if` (correct)
- `if`
- `else`
- `while`
In an if...else if...else statement, what happens if none of the specified conditions are true?
In an if...else if...else statement, what happens if none of the specified conditions are true?
What is the purpose of a loop in programming?
What is the purpose of a loop in programming?
Which type of loop is best suited when you know in advance how many times the loop needs to execute?
Which type of loop is best suited when you know in advance how many times the loop needs to execute?
In a for loop, which part is executed only once at the beginning of the loop?
In a for loop, which part is executed only once at the beginning of the loop?
Which loop continues to execute as long as a specified condition remains true?
Which loop continues to execute as long as a specified condition remains true?
What is a key difference between a while loop and a do-while loop?
What is a key difference between a while loop and a do-while loop?
Which loop is most suitable when you need to execute a block of code at least once, regardless of the initial condition?
Which loop is most suitable when you need to execute a block of code at least once, regardless of the initial condition?
If you want to write a program that simulates rolling a dice until you get a 6, what type of loop structure would be most appropriate?
If you want to write a program that simulates rolling a dice until you get a 6, what type of loop structure would be most appropriate?
What could happen if the condition in a while loop never becomes false?
What could happen if the condition in a while loop never becomes false?
Consider the following C++ code:
int x = 10;
if (x > 5) {
x = 20;
}
std::cout << x;
What will be the output of this code?
Consider the following C++ code:
int x = 10;
if (x > 5) {
x = 20;
}
std::cout << x;
What will be the output of this code?
Consider the following C++ code:
int i = 0;
while (i < 5) {
std::cout << i << " ";
i++;
}
What will be the output of this code?
Consider the following C++ code:
int i = 0;
while (i < 5) {
std::cout << i << " ";
i++;
}
What will be the output of this code?
What is the purpose of the break statement in a loop?
What is the purpose of the break statement in a loop?
What is the purpose of the continue statement in a loop?
What is the purpose of the continue statement in a loop?
Consider the following code snippet:
int x = 0;
do {
x++;
if (x == 3) {
continue;
}
std::cout << x << " ";
} while (x < 5);
What will be the output of this code?
Consider the following code snippet:
int x = 0;
do {
x++;
if (x == 3) {
continue;
}
std::cout << x << " ";
} while (x < 5);
What will be the output of this code?
Which of the following statements about nested if statements is most accurate?
Which of the following statements about nested if statements is most accurate?
What will be the output of the following code?
int num = 7;
if (num > 10) {
std::cout << "Greater than 10";
} else if (num > 5) {
std::cout << "Greater than 5 but not greater than 10";
} else {
std::cout << "Not greater than 5";
}
What will be the output of the following code?
int num = 7;
if (num > 10) {
std::cout << "Greater than 10";
} else if (num > 5) {
std::cout << "Greater than 5 but not greater than 10";
} else {
std::cout << "Not greater than 5";
}
Which of the following loops is guaranteed to execute at least once?
Which of the following loops is guaranteed to execute at least once?
Flashcards
What are Loops?
What are Loops?
A programming construct that repeats a block of code multiple times based on a condition.
What is a 'for' loop?
What is a 'for' loop?
A loop that repeats a block of code a known number of times. Requires initialization, a condition, and an update.
What is a 'while' loop?
What is a 'while' loop?
A loop that repeats a block of code as long as a specific condition is true.
What is a 'do-while' loop?
What is a 'do-while' loop?
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What is an 'if' statement?
What is an 'if' statement?
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What is an 'if...else' statement?
What is an 'if...else' statement?
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What is an 'if...else if...else' statement?
What is an 'if...else if...else' statement?
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What is the 'body' of an if statement?
What is the 'body' of an if statement?
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Study Notes
- The lab focuses on conditions, if statements, loops and exercises
If Statements
- Evaluates a condition in parentheses
- If the condition is true the code executes inside the 'if' body
- If the condition is false then the code is skipped
- The code enclosed in curly braces is the 'if' statement's body
If Else Statements
- Condition evaluation determines code execution
- When the condition is true, the 'if' body code executes, else body code is skipped
- When the condition is false, the 'else' body code executes, if body code is skipped
If Else If Statements
- If Condition1 is true, Code Block 1 executes.
- If Condition1 is false, Condition2 is evaluated.
- If Condition2 is true, Code Block 2 executes.
- If Condition2 is false, Code Block 3 executes.
- Multiple 'else if' statements are permissible, but there's a limit of one 'if' and 'else' statement
Loops
- These are fundamental programming elements that repeat a code block several times depending on particular conditions
- Loops automate repetitive tasks and iterate through data
- There are different kinds of loops that meet specific needs
For Loops
- These loops are used when you know how many times a code block needs to be repeated
- The Syntax is:
for (initialization; condition; update){} - Instructions are repeated as long as the condition is satisfied
While Loops
- These loops repeat code blocks as long as a condition persists as true
- They are ideal when repetition count is undetermined
- The Syntax is:
//initialization
while (condition)
{
//instructions to be repeated as long as condition is satisfied.
//update
}
Do While Loops
- These execute a code block once before condition checking
- Helpful when initial code execution is needed, such as prompting user input for validation
- The Syntax is:
//initialization
do {
//instructions to be repeated as long as condition is satisfied.
//update
} while (condition);
Exercises
- Write an if statement to increase pay by 3% if score > 90, else increase by 1%
- Identify the output of given code snippets with number = 30, and with number = 35
- Create a program that takes user input for weight (pounds) and height (inches), then compute BMI
- Create a basic calculator using 'if' statements for
+, -, /, * - Create a program determining the biggest value out of 3 given numbers utilizing a nested if/else construction
- Create a program that computes the sum of values between 1 and 100
- Create a program that asks the user to provide a number value(n), which determines the number of elements the user will enter
- Develop a program where the user inputs numbers until the number is greater than 15, then displays the sum of the numbers
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