C Program to Print Array Elements Present in Odd Position

In this article, we will learn how to create a program in C that will read array elements and then print all the array elements present at odd positions (index-wise). The question is: write a program in C to read 10 values from an integer array and print all values stored at the odd position. Here is its answer:

#include<stdio.h>
#include<conio.h>
int main()
{
    int arr[10], i;
    printf("Enter any 10 array elements: ");
    for(i=0; i<10; i++)
        scanf("%d", &arr[i]);
    printf("\nValues stored at odd positions are:\n");
    for(i=0; i<10; i++)
    {
        if(i%2!=0)
            printf("%d ", arr[i]);
    }
    getch();
    return 0;
}

The program was written in the Code::Blocks IDE; therefore, after a successful build and run, this is the first snapshot of the sample run:

Supply any 10 numbers or elements for the array and press the ENTER key to see the value stored at the odd index position:

Program Explained

• Receive any 10 numbers as 10 array elements.
• Create a for loop starts from the first number (present at index number 0) to the last number (present at index number 9).
• Check whether the current index number is an odd number or not.
• If it is, then print the value stored at that index number.

Allow the user to define the array size

Now let's modify the above program to allow the user to decide the length of the array:

#include<stdio.h>
#include<conio.h>
int main()
{
    int arr[100], i, limit;
    printf("How many elements you want to store inside the array: ");
    scanf("%d", &limit);
    printf("Enter any %d array elements: ", limit);
    for(i=0; i<limit; i++)
        scanf("%d", &arr[i]);
    printf("\nValues stored at odd position (with array and its index) are:\n");
    for(i=0; i<limit; i++)
    {
        if(i%2!=0)
            printf("arr[%d] = %d\n", i, arr[i]);
    }
    getch();
    return 0;
}

Here is the final snapshot of the sample run:

The following are some of the main steps in the above program:

• Receive the length of the array, say 20.
• Receive 20 numbers as 20 array elements.
• Follow the same procedure as told in the above program's steps.
• That is to find and print the value present at the odd index number.

C Quiz