Multiple conditions in if statement - first is always true

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Why is the first if statement always true?

private String setDepartment (){
   int code = Integer.parseInt(JOptionPane.showInputDialog("Enter The Department Code:\n" +
            "1:Sales\n" +
            "2:Development\n" +
            "3:Accounting\n" +
           "4:None"));

    /*Why this if statement is always true? How do i solve it? */
    if (code !=1 || code !=2 || code !=3 || code !=4)
    {
        JOptionPane.showMessageDialog(null, "Invalid Number.Enter a number between 1-4");
        setDepartment();
    }

    if (code==1){
        return "Sales";
    }
    else if (code==2){
        return "Development";
    }
    else if (code==3){
        return "Accounting";
    }
    else
        return "";
    }

Replace || with &&:

if (code !=1 && code !=2 && code !=3 && code !=4)

can you have two conditions in an if statement, has to be true for the loop to execute. and comparison = for this to work normally both conditions provided with should be true. If the first condition falls false, the compiler doesn’t check the second one. If the first condition is true and the compiler moves to the second and if the second comes out to be false, false is returned to the if statement.

You need to use AND instead of OR.

If the user enters 1 then it's automatically different than 2,3 and 4.

You can therefore use :

if (code !=1 && code !=2 && code !=3 && code !=4)

OR

if (code ==1 || code ==2 || code ==3 || code ==4)

How to specify multiple conditions in an if statement in Javascript , How do you write an if statement with two conditions? The parameters of this function are logical_test, value_if_true, value_if_false. The first parameter contains the condition to be matched. You can use multiple If and AND conditions combined in this logical test. In the second parameter, type the value that you want Excel to display if the condition is true.

From first principles, picking code = 1:

  code !=1 || code !=2 || code !=3 || code !=4
= 1    !=1 || 1    !=2 || 1    !=3 || 1    !=4
= false    || true     || true     || true
= true

You probably meant && rather than ||.

IFS function, Which operator in Java should be used if you need to check if more than 1 condition is true? # Multiple True conditions in an if statement: the and operator. When an if statement requires several True conditions at the same time, we join those different conditions together with the and operator. Such a combined condition becomes False as soon as one condition tests False. Let's look at some examples. # If statement that needs two True conditions

Because at any point of time code value would be any of 1-4. And 3 of 4 conditions would always be true. Change your if condition to

If( !( code ==1 || code == 2 || code == 3 || code == 4))

Java Conditional or Relational Operators, This is a review of what we covered in this tutorial on logic and if statements. We often want to in our programs. If we want to require that two conditions are both true, we can use the && operator ("and"): Challenge: Your First Painting App · Booleans 0 and 1 are both less than 100 , so 50 < x < 100 will always be true . In summary, there can be 2 basic types of multiple conditions - with AND and OR logic. Consequently, your IF function should embed an AND or OR function in the logical test, respectively. AND function. If your logical test contains the AND function, Microsoft Excel returns TRUE if all the conditions are met; otherwise it returns FALSE. OR function.

Review: Logic and if Statements (article), Elaborate if statements that evaluate multiple Boolean expressions The first group are the newMembers > 225 and appDownloads That's possible because Boolean expressions in C# always return a true/false value. But if condition X is true, then we test condition Y. If condition Y is true, you have an output C and if it is false, you have output D. Example: Three conditions and four outcomes. Using the (Nested IF Formula) find the Grade on condition that;-

Complex if statements with C#'s logical operators · Kodify, With the if statement, a program will execute the true code block or do nothing. the true code block or the false code block so something is always executed with an if/else statement. Use two if statements if both if statement conditions could be true at the same time. The C++ Early Objects book contains a discussion (p. Simple conditions can be strung together. This is known as nesting functions. The value_if_true and value_if_false arguments can contain simple conditions of their own. This allows you test more than one condition where subsequent conditions are dependent on the first one. The figure shows a spreadsheet with two user input fields for the type of …

Chapter 4: The if/else (if) statement and Nested statements, The result of a relational operator is one of two special values, true or false . The expression evenFlag || n \% 3 == 0 is true if either condition is true, that is, if evenFlag For example, true || anything is always true, so Java does not need to evaluate Since there are no braces, only the first println is part of the if statement. The operands are both contextually converted to bool (Clause 4). The result is true if both operands are true and false otherwise. Unlike &, && guarantees left-to-right evaluation: the second operand is not evaluated if the first operand is false. The result is a bool.

Comments
  • You probably want to learn about the switch statement here.
  • Because at any point of time code value would be any of 1-4. And 3 of 4 conditions would always be true. Change your if condition to