Java If Else Tutorial

Java if statement is used to check boolean conditions True and False .If is executed when condition is true and when condition is false else is executed .

Java If Else Syntax:

if(test_expression)
{
   //execute your code
}
else if(test_expression n)
{
   //execute your code
}
else
{
   //execute your code
}

Java else if statement example

public class Example {

    public static void main(String args[]) {
        int x = 2,y = 2;

        if (y > x) {
            System.out.println("b is greater");
        }
        else if(x > y){
            System.out.println("a is greater");
        }       
        else {
            System.out.println("Both are equal");
        }
    }
}

Both are equal

Java if else statement

if (expression) {
   // codes
}
else {
  // some other code
}

Java Nested if else

class Number {
    public static void main(String[] args) {

        Double n1 = -1.0, n2 = 4.5, n3 = -5.3, largestNumber;

        if (n1 >= n2) {
            if (n1 >= n3) {
                largestNumber = n1;
            } else {
                largestNumber = n3;
            }
        } else {
            if (n2 >= n3) {
                largestNumber = n2;
            } else {
                largestNumber = n3;
            }
        }

        System.out.println("Largest number is " + largestNumber);
    }
}

Largest number is 4.5