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javaif-statementswitch-statement
MalcolmTent
MalcolmTent

Reputation: 57

not a statement error in if statement within switch case

My problem arises in the if statement - in the event that the variable "hours" is greater than 10, i wish to multiply the additional hours by 2.00 and add 9.95 to the result but i receive an error at compilation and I don't understand why. Any help is much appreciated. 

    String choice;

    double hours;

    Scanner input = new  Scanner(System.in);

    System.out.print("Enter which package you are using A, B or C? ");
    choice = input.nextLine();
    choice = choice.toUpperCase();

    System.out.print("Enter the amount of  hours used: ");
    hours = input.nextDouble();

    switch ( choice )
    {
        case "A":
            if ( hours > 10 ){
                (( hours - 10) * 2 ) + 9.95;    << ERROR: Not a statement!
                }
            else
                System.out.println("Total: $9.95");
            break;

For references sake this has been answered and edited to:

            case "A":
            if ( hours > 10 ){
                total = (( hours - 10) * 2 ) + 9.95;    // Initialised to total
                System.out.println("Total: $" + total);
            }
            else
                System.out.println("Total: $9.95");
            break;

Upvotes: 0

Views: 2180

Answers (4)

Abimaran Kugathasan
Abimaran Kugathasan

Reputation: 32478

That line is not a Java statement, As per Oracle doc, statement should be a complete unit of execution

Statements

Statements are roughly equivalent to sentences in natural languages. A statement forms a complete unit of execution. The following types of expressions can be made into a statement by terminating the expression with a semicolon (;).

  • Assignment expressions
  • Any use of ++ or --
  • Method invocations
  • Object creation expressions

Upvotes: 1

Kick
Kick

Reputation: 4923

You are not setting this expression value (( hours - 10) * 2 ) + 9.95; to any variable. Set the value to any variable like below :

double total = (( hours - 10) * 2 ) + 9.95;

Upvotes: 1

Jakub H
Jakub H

Reputation: 2158

You have to assign your result to the hours variable like this:

hours = (your expression here);

Upvotes: 0

Salah
Salah

Reputation: 8657

You need to assign the result value that generated form that line like:

double value = (( hours - 10) * 2 ) + 9.95;

Read about valid statement in Java

Upvotes: 2

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