what is Nested if Statement || Java Nested if

 Nested if statement

Nested if

If a if statement is used within if statement then such a control structure is called as nested if

if(condition) 

{ 

     if(condition) 

     { 

Statements…3

 ………………….. 

     } 

}

Nested If statement is used to check a condition only if another condition is true

WAP to read a number and check if it is a 2 digit no. or not. If it is a 2 digit no. then check if both digits are same or not.

program:- 

import java.util.Scanner;

public class easy
{
    public static void main(String[] args)
        {
            Scanner likein=new Scanner(System.in);
            System.out.print("Enter a Number:");
            int a=likein.nextInt();
            if(a>=10 && a<=99)
            {
                System.out.println("It is a 2 digit Number");
                int x=a%10;
                int y=a/10;
                if(x==y)
                    System.out.println("Both digits are same");
                else
                    System.out.println("Both digits are Not same");
            }
            else
                System.out.println("It is not a 2 digit Number");
        }
    }

Output:- 

Enter a Number:22
It is a 2 digit Number

Both digits are same.

WAP to read a number and check if it is a positive number or not. If it is a positive number then
check if it is even or not.

program:- 

package com.company;
import java.util.Scanner;
public class easy
{
    public static void main(String[] args)
        {
            Scanner likein=new Scanner(System.in);
            System.out.print("Enter a Number:");
            int a=likein.nextInt();
            if(a>0)
            {
                System.out.println("Number is Positive");
                if(a%2==0)
                    System.out.println("Even Number");
                else
                    System.out.println("Odd Number");
            }
            else
                System.out.println("Number is Not Positive");
        }
    }

Output:- 
Enter a Number:
44
Number is Positive
Even Number

WAP to read 3 angles and check if triangle can be formed or not. If triangle can be formed
then check if it is an isosceles or equilateral or right angled triangle.

package com.company;
import java.util.Scanner;
public class easy
{

        public static void main(String[] args)
        {
            Scanner likein=new Scanner(System.in);
            System.out.print("Enter 3 Angles:");
            int a=likein.nextInt();
            int b=likein.nextInt();
            int c=likein.nextInt();
            if(a+b+c==180)
            {
                System.out.println("Triangle can be formed");
                if(a==b && b==c)
                    System.out.println("Eq.Triangle");
                if(a==b || b==c || c==a)
                    System.out.println("Iso.Triangle");
                if(a==90 || b==90 || c==90)
                    System.out.println("Rt.Ag.Triangle");
            }
            else
                System.out.println("Triangle cannot be formed");
        }
    }
Output:- 
Enter 3 Angles:
90 60 30
Triangle can be formed
Rt.Ag.Triangle