C program :How to take user input for integer array

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C program :How to take user input for integer array

In this article, we will discuss the concept of C program :How to take user input for integer array

In this post, we are going to learn how to write a program to input integer in an array from user e using for, while and do-while loop

Code to input integer of an array

Code to input integer for an array using for loop

In this code, we are going to learn how to input integer in an integer array using for loop in C language

Program 1

#include <stdio.h>
#include <stdlib.h>
#define MAX_SIZE 1000 //Maximum size of the array

int main()
{
    int arr[MAX_SIZE];//Declare an array of MAX_SIZE
    int i,N;
    printf("Enter size of array\n");//Read size of the array
    scanf("%d",&N);

    printf("Enter %d elements in the array\n",N);
    //Read elements of the array
    for(i=0; i<N; i++){
            printf("Enter arr[%d] element in the array: ",i);
        scanf("%d",&arr[i]);
    }
    printf("\nEntered elements of an array\n");
    //print given elements of the array
    for(i=0; i<N; i++){
        printf("%d\n",arr[i]);
    }
    getch();
    return 0;
}

When the above code is executed, it produces the following result

Enter size of array
5

Enter 5 elements in the array
Enter arr[0] element in the array: 13
Enter arr[1] element in the array: 43
Enter arr[2] element in the array: 56
Enter arr[3] element in the array: 76
Enter arr[4] element in the array: 78

Entered elements of an array
13
43
56
76
78

Code to input integer for an array using while loop

In this code, we are going to learn how to input integer in an integer array using while loop in C language

Program 2

#include <stdio.h>
#include <stdlib.h>
#define MAX_SIZE 1000 //Maximum size of the array

int main()
{
    int arr[MAX_SIZE];//Declare an array of MAX_SIZE
    int i,N;
    printf("Enter size of array\n");//Read size of the array
    scanf("%d",&N);

    printf("Enter %d elements in the array\n",N);
    //Read elements of the array
    i=0;
    while(i<N){
            printf("Enter arr[%d] element in the array: ",i);
        scanf("%d",&arr[i]);
         i++;
    }
    printf("\nEntered elements of an array\n");
    //print given elements of the array
    i=0;
    while(i<N){
        printf("%d\n",arr[i]);
         i++;
    }
    getch();
    return 0;
}

When the above code is executed, it produces the following result

Enter size of array
6

Enter 6 elements in the array
Enter arr[0] element in the array: 134
Enter arr[1] element in the array: 567
Enter arr[2] element in the array: 789
Enter arr[3] element in the array: 980
Enter arr[4] element in the array: 654
Enter arr[5] element in the array: 345

Entered elements of an array
134
567
789
980
654
345

Code to input integer for an array using do-while loop

In this code, we are going to learn how to input integer in an integer array using do-while loop in C language

Program 3

#include <stdio.h>
#include <stdlib.h>
#define MAX_SIZE 1000 //Maximum size of the array

int main()
{
    int arr[MAX_SIZE];//Declare an array of MAX_SIZE
    int i,N;
    printf("Enter size of array\n");//Read size of the array
    scanf("%d",&N);

    printf("Enter %d elements in the array\n",N);
    //Read elements of the array
    i=0;
    do{
            printf("Enter arr[%d] element in the array: ",i);
        scanf("%d",&arr[i]);
         i++;
    }while(i<N);
    printf("\nEntered elements of an array\n");
    //print given elements of the array
    i=0;
   do{
        printf("%d\n",arr[i]);
         i++;
    } while(i<N);
    getch();
    return 0;
}

When the above code is executed, it produces the following result

Enter size of array
4

Enter 4 elements in the array
Enter arr[0] element in the array: 2345
Enter arr[1] element in the array: 6789
Enter arr[2] element in the array: 9876
Enter arr[3] element in the array: 7654

Entered elements of an array
2345
6789
9876
7654

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