Why functions are needed - See It in Action

Why Functions Are Needed

📖 Scenario: Imagine you are cooking a meal and need to wash vegetables multiple times. Instead of washing each vegetable separately every time, you create a simple routine to wash vegetables quickly and use it whenever needed.

🎯 Goal: You will write a small C program that shows how using a function helps avoid repeating the same code multiple times.

📋 What You'll Learn

Create a function called washVegetable that prints washing a vegetable

Call the washVegetable function three times in main

Print messages before and after calling the function to show the process

💡 Why This Matters

🌍 Real World

Functions are like small helpers in cooking or any task. They let us reuse steps without repeating ourselves.

💼 Career

Understanding functions is essential for writing clean, efficient code in any programming job.

1

Create the main function

Write the main function that prints Starting to prepare vegetables.

C

int main() {
    // Your code here
}

Need a hint?

The main function is where your program starts. Use printf to print the message.

2

Create the washVegetable function

Create a function called washVegetable that prints Washing a vegetable.

C

#include 

int main() {
    printf("Starting to prepare vegetables\n");
    return 0;
}

// Your code here

Need a hint?

Define the function before main. It does not return anything, so use void.

3

Call washVegetable three times in main

Inside main, call the function washVegetable three times after the starting message.

C

#include 

void washVegetable() {
    printf("Washing a vegetable\n");
}

int main() {
    printf("Starting to prepare vegetables\n");
    // Your code here
    return 0;
}

Need a hint?

Call the function by writing its name followed by parentheses and a semicolon.

4

Print finishing message

After calling washVegetable three times, print Finished preparing vegetables in main.

C

#include 

void washVegetable() {
    printf("Washing a vegetable\n");
}

int main() {
    printf("Starting to prepare vegetables\n");
    washVegetable();
    washVegetable();
    washVegetable();
    // Your code here
    return 0;
}

Need a hint?

Use printf to print the finishing message after the function calls.