java - Issue rounding a double with math.round() -

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• round double 2 decimal places [duplicate] 13 answers

i have java exercise need write method takes 3 parameters; 2 doubles, , 1 char in specific order. once have them need return double value rounded 2 decimal places using math.round(). depending on rules shown.

im not sure how can go getting double value down 2 decimal places, appreciated. thankyou!

import java.util.scanner; public class questionfour {   public static void main(string[] args){   scanner scan = new scanner(system.in);   system.out.println("enter double number");   double num1 = scan.nextdouble();   system.out.println("enter double number");   double num2 = scan.nextdouble();   system.out.println("enter 1 of +, -, *, /, %");   char c = scan.next().charat(0);   system.out.println("the value of calculation is: " + docalculation(num1, num2, c)); } public static double docalculation(double num1, double num2, char c){     double result = 0;    if(c == '+'){      return result = num1 + num2;   }   else if(c == '-'){      if(num1 > num2){         return result = num1 - num2;      }      else if(num1 < num2){         return result = num2 - num1;      }         }   else if(c == '*'){      return result = num1 * num2;   }   else if(c == '/'){      if(num2 == 0){         return 0;      }      else{         return result = num1 / num2;      }   }   else if(c == '%'){      return result = num1 % num2;   }   else{      system.out.println("error! enter 1 of +, -, *, /, %");   }   return math.round((result * 100)/100);    } } 

try this. replace

system.out.println("the value of calculation is: " + docalculation(num1, num2, c)); 

to

system.out.println("the value of calculation is: " + string.format( "%.2f", docalculation(num1, num2, c))); 

wiki