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This works, but not sure why..

I've been playing around with some Java code (not my first language, but I'm trying to wrap my brain around it), but it is not giving me what I expected. I must not be looking at it correctly. I'd appreciate any suggestions on where I am mistaken..

[code]

public class Mix5 {

public static void main(String[] args) {

int x = 0; //declare int named "x" & set value to 0
int y = 30; //declare int named "y" & set value to 30

for(int outer = 0; outer < 3; outer++) {
//Outer for loop: declare int named "outer", set value to 0.
//while value is less than 3, increment by 1.

for(int inner = 4; inner > 1; inner--) {
//Inner for loop: declare int named "inner", set value to 0.
//while is greater than 1, decrement by 1.

y = y - 2; //y = value of y (30) - 2 (28)

if(x == 6) {
break;
} //when x equals 6, break out of loop.

x = x + 3; //x = value of x(0) + 3 (3)
} //end inner for loop.

y = y - 2; //y = value of y (28) - 2 (26)
} //end outer for loop.

System.out.println(x + " " + y); //Print out value of x and y.
} //end main Method.
} //end Class.

[/code]

Here's how I would THINK it would behave:

Setup:
x is set to 0 and y is set to 30.
In outer loop, int outer set to 0, and incremented by 1 until it = 3.
In inner loop, int inner set to 4, and decremented by 1 until it = 1.
Both loops should then complete a total of 3 times.

Action (Loop 1):
y equals itself (30) - 2 = 28.
a check is made, if x equals 6 (it doesn't yet), then break.
x equals itself (0) + 3 = 3.
y equals itself (now 28) - 2 = 26

Action (Loop 2):
y equals itself (26) - 2 = 24.
a check is made, if x equals 6 (it doesn't yet), then break.
x equals itself (3) + 3 = 6.
y equals itself (now 24) - 2 = 22

Action (Loop 3):
y equals itself (now 22) - 2 = 20
a check is made, if x equals 6 (it now does), then break.
Break out of loops.
Print a line with the value of x and the value of y. It should be:

6 20

However, what I get when I run this is:

6 14

Does my if statement only break me out of the inner for loop, not both? This is the only reason I can think that it would continue to process.

Comments

  • j2me64j2me64 Member Posts: 20
    : Does my if statement only break me out of the inner for loop

    exactly! look at the following code

    [code] outer:
    for (int outer = 0; outer < 3; outer++) {
    // Outer for loop: declare int named "outer", set value to 0.
    // while value is less than 3, increment by 1.
    inner:
    for (int inner = 4; inner > 1; inner--) {[/code]

    with the markers outer: and inner: with the break you can specify with loop should be broken.
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