In this tutorial, we are going to write a C Program to write a program using a single subscribed variable to evaluate the square expressions given in the image below, and the values of x1, x2, ... are read from the terminal in C Programming with practical program code and step-by-step full complete explanation.

## C Program to evaluate a square expression.

#include<stdio.h> #include<conio.h> void main() { int i; float x[10],value,total; printf("ENTER 10 REAL NUMBERS"); for(i=0;i<10;i++) { scanf("%f",&value); x[i]=value; } total=0.0; for(i=0;i<10;i++) total=total+x[i]*x[i]; printf("\n"); for(i=0;i<10;i++) printf("x[%2d]=%5.2f\n",i+1,x[i]); printf("total=%.2f",total); }

### Output

ENTER 10 REAL NUMBERS 1.1 2.2 3.3 4.4 5.5 6.6 7.7 8.8 9.9 10.10 X[1]=1.10 X[2]=2.20 X[3]=3.30 X[4]=4.40 X[5]=5.50 X[6]=6.60 X[7]=7.70 X[8]=8.80 X[9]=9.90 X[10]=10.10 Total=446.86

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