C Program to calculate the average of an array

C Program to calculate the average of an array

In this tutorial, we will discuss a simple concept of C Program to calculate the average of an array

In this topic, we will learn about how to calculate the average of n number of elements (integer or floating point)using the array in C programming language.

Average calculates using the operator in C programming language

find the average of integer values

Program 1

In this program, we can see what should be step by step procedure for completion of the program.

• Array declaration and initialization
• Essential variable declaration
• loop for calculating total through each value
• Calculating average
• Display result on the screen

Calculate the average of numbers using an array

#include <stdio.h>
#include <stdlib.h>

int main()
{
    int arr[]={56,78,94,56,73,42,31,67};
//Array declaration and initialization
    int total=0,i;//variable declaration
    for(i=0; i<=7; i++){
        total=total+arr[i];//loop for calculatin total
    }

    double avg=total/i;//calculate average
    printf("The average is:%.2f ",avg);
    getch();//display result on the screen
    return 0;
}

When the above code is compiled and executed, it produces the following results

The average is: 62.125

 

Program 2

In this program, we can see step by step procedure for completion of the program.

• Array declaration
• Essential variable declaration
• loop for taking input from the user for every index
• loop for calculating total through each value
• Calculating average
• Display result on the screen

Calculate the average of numbers using an array – entered by the user

#include <stdio.h>
#include <stdlib.h>

int main()
{
    int arr[20],num,i;//array declaration
    double avg=0,sum=0;//variable declaration
printf("Enter the numbers of average: ");
    scanf("%d",&num);;;get inpur from user to numberof elements
printf("Enter the numbers: \n");
    for(i=1; i<=num; i++){//loop for get input numbers
        scanf("%d", &arr[i]);
    }
    for(i=1; i<=num; i++){
        sum=sum+arr[i];//loop for calculating sum
        avg=sum/num;//calculate average
    }
    printf("Average of entered numbers are: %f",avg);
    getch();//display result on the screen
    return 0;
}

When the above code is compiled and executed, it produces the following results

Enter the numbers of average: 5
Enter the numbers:
67
87
98
90
89
Average of entered numbers are: 86.200000

 

find the average of floating point values

Program 3

In this program, we can see what should be step by step procedure for completion of the program.

• Array declaration and initialization
• Essential variable declaration
• Loop for calculating total through each value
• Calculating average
• Display result on the screen

Calculate the average of numbers using an array

#include <stdio.h>
#include <stdlib.h>

int main()
{
    float arr[5]={23.45,25.4,38.99,45.6,12.5};
//Array declaration and initialization
    float total=0.0;
    float avg=0.0;//variable declaration
    int i;
    for(i=0; i<=4; i++){
        total=total+arr[i];//loop for calculate total
    }
     avg=total/5;
    printf("The average is:%.2f ",avg);
    getch();
    return 0;
}

When the above code is compiled and executed, it produces the following results

The average is: 29.19

 

Program 4

In this program, we can see what should be step by step procedure for completion of the program.

• Array declaration
• Essential variable declaration
• loop for taking input from the user for every index
• loop for calculating total through each value
• Calculating average
• Display result on the screen

Calculate the average of numbers using an array – entered by the user

#include <stdio.h>
#include <stdlib.h>

int main()
{
    float arr[20];//array declaration
    int i,num;//variable declaration
    double avg=0.0,sum=0.0;
printf("Enter the numbers of average: ");
    scanf("%d",&num);//get input from user

    for(i=0; i<num; i++){ //loop for get input from user
        printf("Enter the number %d: ",i+1);
        scanf("%f", &arr[i]);
    }
    for(i=0; i<num; i++){ //loop calculating sum of array elements
        sum=sum+arr[i];
        avg=sum/num; //calculating average
    }
    printf("Average of entered numbers are: %.2f",avg);
    getch();//display result on the screen
    return 0;
}

When the above code is compiled and executed, it produces the following results

Enter the number of average: 5
Enter the number 1: 12.23
Enter the number 2: 23.34
Enter the number 3: 34.45
Enter the number 4: 45.56
Enter the number 5: 56.67
Average of entered numbers are: 34.45

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