Do .... While Statement

Do... while statement is similar to while statement , except that the condition is checked after executing each loop , which means that the first loop is performed without a check . The computer executes the do..while loop as the following flowchart :

Example 1 : Calculate Polynomial Value 

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

int main()
{
   float x,y;

   do {

    printf("\nplease enter x value \n");
    scanf("%f",&x);
    y=(x*x*x)+(3*x*x)+(7.6*x)+12;
    printf("The value of y =%f\n",y);
    printf("Do you want to evaluate again ?(y/n)\n");

   }while(getche()=='y');


    return 0;
}

Output Sample : 

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