Array.c

#include <stdio.h>
void main()
{
    int n,i,ch=0;
    printf("Enter no. of elements in the array and then enter those numbers\n");
    scanf("%d",&n);
    int arr[n];
    for(i=0;i<n;i++)
    { printf("%d:",i+1);
        scanf("%d,",&arr[i]);
    }
while(ch!=6)
    {
    printf("Enter your choice \n");
    printf(" 1 - The sum of all elements \n 2 - The largest element \n 3 - The smallest element \n");
    printf(" 4 - The average of all elements\n 5 - Display the array in reverse order\n 6 - Exit\n");
    scanf("%d",&ch);
    if(ch==1)
    {
        int sum=0;
        for(i=0;i<n;i++)
        {
            sum=sum+arr[i];
        }
        printf("The sum of all the elements is %d \n",sum);
    }
    else if(ch==2)
    {
        int max=arr[0];
        for(i=0;i<n;i++)
        {
            if(max<arr[i])
            {
                max=arr[i];
            }
        }
        printf("The maximum among all the elements is %d \n",max);
    }
    else if(ch==3)
    {
        int min=arr[0];
        for(i=0;i<n;i++)
        {
            if(min>arr[i])
            {
                min=arr[i];
            }
        }
        printf("The minimum among all the elements is %d  \n",min);
    }
    else if(ch==4)
    {
        float avg;
        float sum=0;
        for(i=0;i<n;i++)
        {
            sum=sum+arr[i];
        }
        avg=sum/n;
        printf("The average of all the elements is %f \n",avg);
    }
    else if(ch==5)
    {
        int rev[n];
        for(i=0;i<n;i++)
        {
            rev[n-i-1]=arr[i];
        }
        for(i=0;i<n;i++)
        {
            printf("%d  ",rev[i]);
        }
        printf("\n");
    }
    else if(ch==6);
    else  
    {
        printf("Enter valid choice \n");
    }
}
    printf("Thankyou for using the array calculator");
}