Sum of square of series of no.

Write a program using single subscripted variable to evoluate the following expressions:
total=x1^2 + x2^2 +.......................+x10^2 .

This problem is very easy to implement & solve.
just make an array & take input.

       total=0    // initialise total to 0 initially 

       i=0;    //you can use for loop instead of using while 
      while(i<10)  
      {  
           total=total+(arr[i]*arr[i]);  // this is main operation 
           i++;  
      }

              C program :

 /*  
 Write a program using single subscripted variable to evoluate the following expressions:  
 total=x1^2 + x2^2 +.......................+x10^2  
 */  
 #include<stdio.h>  
 main()  
 {  
      float arr[10];  
      float total=0;  
      int i;  
      /*......................taking input................*/  
      for(i=0;i<10;i++)  
      {  
           printf("\n enter %dth element :",i+1);  
           scanf("%f",&arr[i]);  
      }//end of for loop & input operation  
      /*............operation................................*/  
      i=0;  
      while(i<10)  
      {  
           total=total+(arr[i]*arr[i]);  
           i++;  
      }//end of operation & while loop  
      printf("Requre sum of squre is : %.2f",total); //%2f use for limit no of digit after decimal  
 }  

OUTPUT :

sum of square