Else–if ladder in C - Mini Project: Build & Apply

Else-if ladder

📖 Scenario: You are creating a simple program that categorizes a person's age group based on their age.

🎯 Goal: Build a program that uses an else-if ladder to print the correct age group for a given age.

📋 What You'll Learn

Create an integer variable called age with the value 25

Create an else-if ladder to check the age and assign the correct age group

Use these age groups: Child (0-12), Teen (13-19), Adult (20-59), Senior (60 and above)

Print the age group using printf

💡 Why This Matters

🌍 Real World

Programs often need to make decisions based on ranges, like categorizing ages, prices, or scores.

💼 Career

Understanding <code>else-if</code> ladders is essential for writing clear decision-making code in many software jobs.

1

Create the age variable

Create an integer variable called age and set it to 25.

C

int age = 0;
// Your code here

Need a hint?

Use int age = 25; inside the main function.

2

Set up the else-if ladder

Add an else-if ladder to check the value of age for these groups: age <= 12, age <= 19, age <= 59, and else for 60 and above.

C

#include 

int main() {
    int age = 25;

    if (age <= 12) {
        
    } else if (age <= 19) {
        
    } else if (age <= 59) {
        
    } else {
        
    }

    return 0;
}
// Your code here

Need a hint?

Use if, else if, and else to check the age ranges.

3

Add printf statements for each age group

Inside each block of the else-if ladder, add a printf statement to print the correct age group: "Child", "Teen", "Adult", or "Senior".

C

#include 

int main() {
    int age = 25;

    if (age <= 12) {
        printf("Child\n");
    } else if (age <= 19) {
        printf("Teen\n");
    } else if (age <= 59) {
        printf("Adult\n");
    } else {
        printf("Senior\n");
    }

    return 0;
}
// Your code here

Need a hint?

Use printf inside each condition to print the age group.

4

Print the age group

Run the program and print the age group for age = 25 using printf. The output should be Adult.

C

#include 

int main() {
    int age = 25;

    if (age <= 12) {
        printf("Child\n");
    } else if (age <= 19) {
        printf("Teen\n");
    } else if (age <= 59) {
        printf("Adult\n");
    } else {
        printf("Senior\n");
    }

    return 0;
}
// Your code here

Need a hint?

Run the program and check the output is Adult.