Fahrenheit and Celsius table

Hello reader,

This program is of making the table of Fahrenheit and Celsius and when user will give any value in it it will be showing the result.

#include <stdio.h> //standard library function

#include<conio.h>

  int main()

 {

    int fahr, cel, lower, upper, step;  //define variable

    lower = 0,upper = 300;

    step = 20;     //table upto 20

    fahr = lower;

    while (fahr <= upper) //condition checking {   

     cel = 5 * (fahr - 32) / 9;    //formula for Celsius

     printf("%d\t%d\n",fahr, cel);   //display the result

     fahr += step;

    }

    return 1;  //return the value 

  }