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Real-Life Examples of Loops in C

Loops are essential in programming for automating repetitive tasks. Here are some real-life scenarios where loops are used in C programming.

Examples

1. Summing Elements in an Array

#include <stdio.h>

int main() {
    int numbers[] = {2, 4, 6, 8, 10};
    int sum = 0;
    int i;
    for (i = 0; i < 5; i++) {
        sum += numbers[i];
    }
    printf("Sum of elements: %d\n", sum);
    return 0;
}

2. Searching for an Element

#include <stdio.h>
#include <stdbool.h>

int main() {
    int data[] = {3, 7, 1, 9, 5};
    int key = 9;
    bool found = false;
    int i;
    for (i = 0; i < 5; i++) {
        if (data[i] == key) {
            found = true;
            break;
        }
    }
    if (found) {
        printf("Element %d found at index %d.\n", key, i);
    } else {
        printf("Element %d not found.\n", key);
    }
    return 0;
}

3. Reading Data Until End-of-File

#include <stdio.h>

int main() {
    FILE *file = fopen("data.txt", "r");
    int value;
    if (file == NULL) {
        printf("Error opening file.\n");
        return 1;
    }
    while (fscanf(file, "%d", &value) != EOF) {
        printf("Read value: %d\n", value);
    }
    fclose(file);
    return 0;
}

Key Takeaways

  • Loops automate repetitive tasks and are fundamental in programming.
  • Understanding different loop constructs allows you to choose the most appropriate one for a given problem.
  • Real-life examples demonstrate the practical applications of loops.
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