How to Reverse an Array in C

How to Reverse an Array in C ?

Answer

To reverse an array in C, you can swap elements from the start and end of the array using a loop until you reach the middle.

✐ Examples

1 Reverse Array of Integers

In this example,

We have an array named intArray containing integers.
We define two variables start and end to track the start and end indices of the array.
We use a loop to swap elements from start to end until start is greater than or equal to end (indicating we've reached the middle).
We print the reversed array to demonstrate the reversal.

C Program

#include <stdio.h>

int main() {
    int intArray[] = {1, 2, 3, 4, 5};
    int length = sizeof(intArray) / sizeof(intArray[0]);
    for (int start = 0, end = length - 1; start < end; start++, end--) {
        int temp = intArray[start];
        intArray[start] = intArray[end];
        intArray[end] = temp;
    }
    printf("Reversed Array: ");
    for (int i = 0; i < length; i++) {
        printf("%d ", intArray[i]);
    }
    return 0;
}

Output

Reversed Array: 5 4 3 2 1

2 Reverse Array of Strings

In this example,

We have an array named strArray containing strings.
We define two variables start and end to track the start and end indices of the array.
We use a loop to swap elements from start to end until start is greater than or equal to end (indicating we've reached the middle).
We print the reversed array to demonstrate the reversal.

C Program

#include <stdio.h>
#include <string.h>

int main() {
    char* strArray[] = {"apple", "banana", "cherry"};
    int length = sizeof(strArray) / sizeof(strArray[0]);
    for (int start = 0, end = length - 1; start < end; start++, end--) {
        char* temp = strArray[start];
        strArray[start] = strArray[end];
        strArray[end] = temp;
    }
    printf("Reversed Array: ");
    for (int i = 0; i < length; i++) {
        printf("%s ", strArray[i]);
    }
    return 0;
}

Output

Reversed Array: cherry banana apple

Summary

In this tutorial, we learned How to Reverse an Array in C language with well detailed examples.

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How to Reverse an Array in C

How to Reverse an Array in C ?

Answer

✐ Examples

1 Reverse Array of Integers

C Program

Output

2 Reverse Array of Strings

C Program

Output

Summary

More C Arrays Tutorials