If statement in C - Mini Project: Build & Apply

If Statement Basics in C

📖 Scenario: You are creating a simple program to check if a person is old enough to vote. Voting age is 18 years or older.

🎯 Goal: Build a C program that uses an if statement to check a person's age and print whether they can vote or not.

📋 What You'll Learn

Create an integer variable called age with the value 20

Create an integer variable called voting_age with the value 18

Use an if statement to check if age is greater than or equal to voting_age

Print "You can vote!" if the condition is true

Print "You cannot vote yet." if the condition is false

💡 Why This Matters

🌍 Real World

Checking age eligibility is common in many real-world applications like voting, driving, or buying age-restricted products.

💼 Career

Understanding if statements is fundamental for any programming job because it helps make decisions in code.

1

Create the age variable

Create an integer variable called age and set it to 20.

C

#include 

int main() {
    int age = 20;
    // Your code here
    return 0;
}

Need a hint?

Use int age = 20; inside the main function.

2

Create the voting age variable

Create an integer variable called voting_age and set it to 18.

C

#include 

int main() {
    int age = 20;
    int voting_age = 18;
    // Your code here
    return 0;
}

Need a hint?

Use int voting_age = 18; inside the main function after age.

3

Write the if statement to check voting eligibility

Use an if statement to check if age is greater than or equal to voting_age. Inside the if block, write printf("You can vote!\n");. Use an else block to print "You cannot vote yet.\n".

C

#include 

int main() {
    int age = 20;
    int voting_age = 18;

    if (age >= voting_age) {
        // Your code here
    } else {
        // Your code here
    }

    return 0;
}

Need a hint?

Use if (age >= voting_age) and else with printf statements inside each block.

4

Print the result

Run the program and print the output. Use printf statements inside the if and else blocks as before. The program should print You can vote!.

C

#include 

int main() {
    int age = 20;
    int voting_age = 18;

    if (age >= voting_age) {
        printf("You can vote!\n");
    } else {
        printf("You cannot vote yet.\n");
    }

    // Your code here
    return 0;
}

Need a hint?

Compile and run the program to see the output.