CODEWITHSUNDEEP
javaloopsif-statementreturn
user2653955
user2653955

Reputation: 11

what happens after the return statement in an if statement in a for loop

I wanted to keep it short. What happens after it returns true? Does it stop the for-loop and return to the do-while loop? I'm very confused; please provide a detailed description. 

for (int i = 0; i < 6; i++) 
    {
        int pick;
        do 
        {
            pick = (int) Math.floor(Math.random() * 50 + 1);
        } 
        while (numberGone(pick, gui.numbers, i)); 
        gui.numbers[i].setText("" + pick);
    }
    boolean numberGone(int num, JTextField[] pastNums, int count) 
    { 
        for (int i = 0; i < count; i++) 
        {
            if (Integer.parseInt(pastNums[i].getText()) == num) 
            {
                return true;
            }
        }
        return false;
    }

Upvotes: 0

Views: 4793

Answers (2)

Shashwat Kumar
Shashwat Kumar

Reputation: 5297

The function always exits when a return statement is encountered. No statement after that will be executed.
The only exception is try catch finally block.
finally block is always executed irrespective of whether return is encountered before it or not.

Upvotes: 1

Juned Ahsan
Juned Ahsan

Reputation: 68715

A method returns the control as soon as it hits the first return statement. Any code after the return statement will not be executed. So in your code:

boolean numberGone(int num, JTextField[] pastNums, int count) 
    { 
        for (int i = 0; i < count; i++) 
        {
            if (Integer.parseInt(pastNums[i].getText()) == num) 
            {
                // if this is executed, execution of this method will return from here
                return true;
            }
        }
        // this will be executed only when if statement is not executed and for loop finishes gracefully
        return false;
    }

Note: If you don't want to return from the method when your if condition is met and simply end the loop then use break instead of return.

Upvotes: 2

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