Question

HELP! I'm receiving this error bad operands type for binary operator "*" PLS HELP! WILL AWARD MEDAL! (JAVA)

Answer 1

import java.util.Scanner;
public class TDEE
{
public static void main(String[] args)
{Scanner in = new Scanner(System.in);
double restingmale = 1.0;
double restingfemale = 1.0;


System.out.println("Enter your name (First and Last): ");
String Firstname = in.next();
String Lastname = in.nextLine();
System.out.println("");

System.out.println("Enter your gender (M or F): ");
String gender = in.next();
System.out.println("");

System.out.println("Enter your BMR: ");
String userbmr = in.next();

System.out.println("\nSelect your Activity Level");
System.out.println("[0] Resting Sleeping, reclining ");
System.out.println("[1] Sedentary Minimal movement");
System.out.println("[2] Light Office work, sitting");
System.out.println("[3] Moderate Light manual labor");
System.out.println("[4]Very Active Hard manual labor");
System.out.println("[5] Extremely Active Heavy manual labor");
System.out.print("\nEnter the letter corresponding your activity level: ");
int userchoice = in.nextInt();
System.out.println();

double activityFactor = 0;

if(userchoice == 0)
{activityFactor = 1.0;}
else if (userchoice == 1)
{activityFactor = 1.3;}
else if (userchoice == 2)
{if(gender.equalsIgnoreCase("m"))
{activityFactor = 1.6;}
else
{activityFactor = 1.5;}
}
else if (userchoice == 3)
{if (gender.equalsIgnoreCase("m"))
{activityFactor = 1.7;}
else
{activityFactor = 1.6;}
}
else if (userchoice == 4)
{if (gender.equalsIgnoreCase("m"))
{activityFactor = 2.1;}
else
{activityFactor = 1.9;}
}
else if (userchoice == 5)
{if (gender.equalsIgnoreCase("m"))
{activityFactor = 2.4;}
else
{activityFactor = 2.2;}
}
else
{ System.out.println("Invalid action. Try again"); }

double tdee = userbmr * activityFactor;

System.out.println("Name: " + Firstname + Lastname + " ");
System.out.print("Gender: " + gender);
System.out.println("BMR: " + userbmr + " ");
System.out.print("Activity Factor: " + activityFactor);
System.out.println("TDEE: " + tdee);
}
}

Answer 2

usermbr is a String. activityFactor is a double. Multiplication using a String and a double won't work.

Answer 3

@rsmith6559 ahhh thx!

Answer 4

84

Answer 5

heelur