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Thread: I need help with these "if" statement and boolean errors

  1. #1
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    Post I need help with these "if" statement and boolean errors

    The purpose of this program that I'm writing is to calculate a user's total daily energy expenditure. However, for some reason, it's giving me a ton of errors regarding my boolean operators and "if-else-if" statements. I feel like I'm missing something obvious, could you guys help?:
     
    import java.util.Scanner;
    public class TDEE
    {
        public static void main(String [] args)
        {
            double activityFactor;   
            double TDEE;
            Scanner in = new Scanner(System.in);        
     
     
            System.out.print("Please enter your name: ");
            String firstName = in.next();                    
            String lastName = in.next();
            System.out.println(firstName + " " + lastName);
            System.out.print("Please enter your BMR: ");
            double userBMR = in.nextDouble();
            System.out.println(userBMR);
            System.out.print("Please enter your gender (M/F): ");
            String userGender = in.next();
            System.out.println(userGender);
            System.out.println();
     
            System.out.println("Select your Activity Level");
            System.out.println("[A] Resting (Sleeping, Reclining)");
            System.out.println("[B] Sedentary (Minimal Movement)");
            System.out.println("[C] Light (Sitting, Standing)");
            System.out.println("[D] Moderate (Light Manual Labor, Dancing, Riding Bike)");
            System.out.println("[E] Very Active (Team Sports, Hard Manual Labor)");
            System.out.println("[F] Extremely Active (Full-Time Athlete, Heavy Manual Labor)");
            System.out.println();
            System.out.print("Enter the letter corresponding to your activity level: ");
            String choice = in.next();
            System.out.println(choice);
     
            if(choice.equalsIgnoreCase("A"))                          
            {                                                           
                activityFactor = 1.0;
                TDEE = userBMR * activityFactor;
            }                                                          
            else if (choice.equalsIgnoreCase("B")) 
            {
                activityFactor = 1.3;
                TDEE = userBMR * activityFactor;
            }
            }
            else if (choice.equalsIgnoreCase("C")) && (userGender.equalsIgnoreCase("F"))
            {
                activityFactor = 1.5;
                TDEE = userBMR * activityFactor;
            }
            else if ((choice.equalsIgnoreCase("C")) && (userGender.equalsIgnoreCase("M"))) || ((choice.equalsIgnoreCase("D")) && (userGender.equalsIgnoreCase("F")))
            {
                activityFactor = 1.6;
                TDEE = userBMR * activityFactor;
            }
            else if (choice.equalsIgnoreCase("D")) && (userGender.equalsIgnoreCase("M"))
            {
                activityFactor = 1.7;
                TDEE = userBMR * activityFactor;
            }
            else if (choice.equalsIgnoreCase("E")) && (userGender.equalsIgnoreCase("F"))
            {
                activityFactor = 1.9;
                TDEE = userBMR * activityFactor;
            }
            else if (choice.equalsIgnoreCase("E")) && (userGender.equalsIgnoreCase("M"))
            {
                activityFactor = 2.1;
                TDEE = userBMR * activityFactor;
            }
            else if (choice.equalsIgnoreCase("F")) && (userGender.equalsIgnoreCase("F")) 
            {
                activityFactor = 2.2;
                TDEE = userBMR * activityFactor;
            }
            else if (choice.equalsIgnoreCase("F")) && (userGender.equalsIgnoreCase("M"))
            {
                activityFactor = 2.4;
                TDEE = userBMR * activityFactor;
            }
            else 
            {
                System.out.println("You did not choose a valid menu option!");
            }
            System.out.println();
            System.out.print("Name: " + firstName + " " + lastName);
            System.out.println("     Gender: " + userGender);
            System.out.print("BMR: " + userBMR);
            System.out.println("     Activity Factor: " + activityFactor);
            System.out.print("TDEE: " + TDEE);
     
         }//end of main method
    }//end of class
    Last edited by Norm; November 25th, 2019 at 06:12 PM. Reason: Added []s to code tags

  2. #2
    Super Moderator Norm's Avatar
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    Default Re: I need help with these "if" statement and boolean errors

    it's giving me a ton of errors
    Please copy full text of error messages and paste here.
    If you don't understand my answer, don't ignore it, ask a question.

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