Why conditional logic is needed - Challenge Your Understanding

Challenge - 5 Problems

❓ Predict Output

intermediate

What is the output of this C code with conditional logic?

Look at this C program. What will it print when run?

C

#include <stdio.h>

int main() {
    int temperature = 30;
    if (temperature > 25) {
        printf("It's hot today!\n");
    } else {
        printf("It's cool today!\n");
    }
    return 0;
}

A It's hot today!

B It's cool today!

C Compilation error

D No output

💡 Hint

Check the value of temperature and the condition in the if statement.

The variable temperature is 30, which is greater than 25, so the if block runs and prints "It's hot today!".

🧠 Conceptual

intermediate

Why do we need conditional logic in programs?

Which of these best explains why conditional logic is important in programming?

A It automatically fixes errors in the code.

B It makes programs run faster by skipping code.

C It stores data permanently for later use.

D It allows programs to make decisions and choose different actions based on data.

💡 Hint

Think about how a program can behave differently depending on what it sees.

Conditional logic lets a program decide what to do next based on conditions, like checking if a number is big or small.

🔧 Debug

advanced

What error does this C code cause?

Look at this code snippet. What error will it cause when compiled?

C

#include <stdio.h>

int main() {
    int x = 10;
    if x > 5 {
        printf("x is greater than 5\n");
    }
    return 0;
}

A Runtime error: division by zero

B Syntax error: missing parentheses around condition

C No error, prints 'x is greater than 5'

D Syntax error: missing semicolon after if

💡 Hint

Check the syntax of the if statement condition.

In C, the condition in an if statement must be inside parentheses. Missing them causes a syntax error.

❓ Predict Output

advanced

What is the output of nested if-else in this C code?

What will this program print?

C

#include <stdio.h>

int main() {
    int score = 75;
    if (score >= 90) {
        printf("Grade A\n");
    } else if (score >= 70) {
        printf("Grade B\n");
    } else {
        printf("Grade C\n");
    }
    return 0;
}

A Grade B

B Grade A

C Grade C

D No output

💡 Hint

Check which condition matches the value of score.

The score is 75, which is not >= 90 but is >= 70, so it prints "Grade B".

🧠 Conceptual

expert

How does conditional logic improve program flexibility?

Which statement best describes how conditional logic helps programs be flexible?

A It stores user data securely in memory.

B It makes programs run faster by removing unnecessary code.

C It lets programs respond differently to changing inputs or situations.

D It automatically corrects user mistakes without input.

💡 Hint

Think about how programs can change what they do based on what happens.

Conditional logic allows programs to choose different paths, making them adaptable to different inputs or conditions.