Java Learning 3

Branching

In j ava, an if test is basically the same as the boolean test in a

while loop - except instead of saying, while there's still beer..",

you will say, “ if there's still beer…."

class IfTest (

public static void main (String [] args) {

int x = 3;

i f (x== 3) {

System.out.println(“ x must be 3” ) ;

}

System.out .println( "This runs no matter what");

},

Output :

x must be 3

This runs no matter what

The code above executes the line that prints "x must be 3" only

if the condition (x is equal to 3) is true. Regardless of whether

it's true, though, the line that prints, "This runs no matter what"

will run. So depending on the value of x , either one statement

or two will print out.

But we can add an else to the condition, so that we can

say something like, "If there's still beer, keep coding, else

(otherwise) get more beer, and then continue on…"

class IfTest (

public static void main (String [] args) {

int x = 2;

i f (x== 3) {

System.out.println(“ x must be 3” ) ;

}

else{

System.out.println (“x is not 3”) ;

}

System.out .println( "This runs no matter what");

},

output :

x is not 3

This runs no matter what