if else if in java

if-else-if ladder:

• Used to defined multiple if blocks.
• One if block execution depend to another if block.
• All the conditions execute sequentially from top to bottom.
• A specific block execute only if the corresponding condition is valid.

Syntax:
	if (condition){
		Logic….
	}
	else if (condition){
		Logic….
	}
	else if (condition){
		Logic….
	}
	else{
		Logic…
	}

Flow Chart:

Code program:

class Conditional
{
	public static void main(String[] args) 
	{
		if (false)
			System.out.println("if-block");
		else if (true)
			System.out.println("else-if block");
		else
			System.out.println("else block");
	}
}

Check the input number is positive or negative:

class Test 
{
	public static void main(String[] args) 
	{
		int num=-13;
		if(num>0)
			System.out.println("Positive number");
		else if(num<0)
			System.out.println("Negative number");
		else
			System.out.println("Zero");
	}
}

Biggest of 3 numbers:

class Conditional
{
	public static void main(String[] args) 
	{
		int a=10, b=30, c=20 ;
		if (a>b && a>c)
			System.out.println("a is big");
		else if (b>c)
			System.out.println("b is big");
		else
			System.out.println("c is big");
	}
}

Leap Year:

1. 400 multiples are leap years
2. 4 multiples are leap years
3. 100 multiples are not leap years (100,200,300,500,600,700,900..)

class Test 
{
	public static void main(String[] args) 
	{
		int yr = 100;
		
		if(yr%400 == 0)
			System.out.println("Leap year");
		else if(yr%4==0 && yr%100 != 0)
			System.out.println("leap year");
		else
			System.out.println("not leap year");
	}
}