Why arrays are needed in C - See It in Action

Why Arrays Are Needed

📖 Scenario: Imagine you want to store the scores of 5 students in a class. Instead of creating 5 separate variables, you can use an array to keep all scores together in one place.

🎯 Goal: You will create an array to store 5 student scores, set a passing score threshold, find which students passed, and print their scores.

📋 What You'll Learn

Create an integer array called scores with exactly 5 elements: 58, 75, 62, 90, 45

Create an integer variable called passing_score and set it to 60

Use a for loop with variable i to check each score in scores against passing_score

Print the scores of students who passed using printf

💡 Why This Matters

🌍 Real World

Arrays are used in real life to store lists of things like scores, temperatures, or names all together.

💼 Career

Knowing arrays is important for programming jobs because they help manage and process collections of data efficiently.

1

Create the scores array

Create an integer array called scores with exactly 5 elements: 58, 75, 62, 90, and 45.

C

// Your code here

Need a hint?

Use int scores[5] = {58, 75, 62, 90, 45}; to create the array.

2

Set the passing score

Create an integer variable called passing_score and set it to 60.

C

int scores[5] = {58, 75, 62, 90, 45};
// Your code here

Need a hint?

Use int passing_score = 60; to set the threshold.

3

Check which students passed

Use a for loop with variable i from 0 to 4 to check each score in scores. Inside the loop, use an if statement to check if scores[i] is greater than or equal to passing_score.

C

int scores[5] = {58, 75, 62, 90, 45};
int passing_score = 60;
// Your code here

Need a hint?

Use for (int i = 0; i < 5; i++) and inside it if (scores[i] >= passing_score).

4

Print the passing scores

Inside the if block, use printf to print the message: "Student i passed with score score\n", where i is the student index and score is scores[i].

C

int scores[5] = {58, 75, 62, 90, 45};
int passing_score = 60;
for (int i = 0; i = passing_score) {
        // Your code here
    }
}

Need a hint?

Use printf("Student %d passed with score %d\n", i, scores[i]); inside the if block.