how to combine switch and if else statements

Question

I'm taking an online java class and the teacher has asked for the following: Write a menu program that ask a user for a number indicating the four basic math equations(addition, subtraction, multiplication, division). Using a if/else structure to do the required operation, ask the user for inputs and solve the equation. I am new to this, but I don't see the point of the if/else, but I guess that is irrelavent.

If I use case 1, 2, 3, 4 as below to determine the operation, how do I refference the case with a 'If statement'?

int userSelection;
double x;        
double y;        
double answer;

switch ( userSelection ) {
   case 1:
        TextIO.putln("Let's add! ");
        TextIO.putln();
        TextIO.putln("Enter the first number: ");
        x = TextIO.getlnDouble();
    TextIO.putln("Enter the second number: ");
        y = TextIO.getlnDouble();
        break;

//I thought I could use the 'If' like this

        if (case 1);  // I don't know how to refference this correctly
        answer = x + y;
        TextIO.putln( x 'plus' y 'equals' answer);

Thanks in advance!

Answer 1

It would appear to me that your instructor does not want you to use the switch statement to begin with, but simply use the if flow control structure:

if(booleanExpression)
{

}
else if(booleanExpression2)
{

}