Arrays In C

An array is a variable that can store multiple values. Like you can store your name as a string and you can also store integer values, float values etc. For example you can store many numbers of integer in a single array. You don't have to make 10 or 100 or many scanfs in your code.

Here is the simple example of an Array:-)

//Example of 1D Array

#include<stdio.h>

int main()

{

    int arr;

    char str[10];

    printf("Enter your Name: ");

    scanf("%s",&str);

    printf("Enter your roll no: ");

    scanf("%d",&arr);

    printf("Hello %s and %d is your roll no.",str,arr);

    int n,i,physum=0,matsum=0,chemsum=0;

    printf("\nEnter the number of students in your class: ");

    scanf("%d",&n);

    int maths[n],chem[n],phy[n];

    printf("Enter marks of Maths for\n");

    for(i=1;i<=n;i++)

    {

        printf("\nStudent %d: ",i);

        scanf("%d",&maths[i]);

    }

     printf("Enter marks of Physics for\n");

    for(i=1;i<=n;i++)

    {

        printf("\nStudent %d: ",i);

        scanf("%d",&phy[i]);

    }

     printf("Enter marks of Chemistry for\n");

    for(i=1;i<=n;i++)

    {

        printf("\nStudent %d: ",i);

        scanf("%d",&chem[i]);

    }

    for(i=1;i<=n;i++)

    {

        physum+=phy[i];

        matsum+=maths[i];

        chemsum+=chem[i];

    }

    printf("\nSum of all the marks obtained by %d students in\nMaths:%d\nPhysics:%d\nChemistry:%d",n,matsum,physum,chemsum);

    printf("\n");

    for(i=1;i<=n;i++)

    {

        printf("\nAverage of all marks for student %d is:%d",i,(phy[i]+maths[i]+chem[i])/3);

    }

    printf("\nAverage marks in Maths: %d",matsum/n);

    printf("\nAverage marks in Physics: %d",physum/n);

    printf("\nAverage marks in Chemistry: %d",chemsum/n);

    return 0;

}

//Example of 2D Array

#include<stdio.h>

int main()

{

    char name_of_students[6][8]={"Govind","Yesha","Mark","Tina","Porter"};

    for(int i=0;i<6;i++)

    {

        for(int j=0;j<8;j++)

        {

             printf("%c",name_of_students[i][j]);

        }printf("\n");

    }

    return 0;

}