Day16 ,Conditional Statements:

Conditional Statements:

==> Conditional statements, like the if-else statement in Java, control program flow based on conditions.
==> The if-else syntax consists of an initial condition followed by code blocks for true and false outcomes.
==> It enables executing different code paths depending on whether a condition evaluates to true or false.

Types of Decision-Making Statements:

1. if statement
2. if-else statement
3. if-else-if statement
4. nested-if statement
5. switch statement

If Statement:

==> If a certain condition is true then a block of statements is executed otherwise not.

Example program:

package day1if;

        public class Main {

    public static void main(String[] args) 
    {
        // TODO Auto-generated method stub
        int bat=500;
        if(bat >=500)
        {
        System.out.println("go to play");

        System.out.println("dont play");
    }

        }
        }

Output:

 go to play
 dont play

If else statement:

==> The Java if-else statement also tests the condition. It executes the if block if condition is true otherwise else block is executed.

Example program:

package day1if;

public class Main1 {
public static void main(String []args)
{
int bat=500;
if(bat>600)
{
System.out.println("go to play");
}
else{
System.out.println("don't play");
}
}
}

Output:

 don't play

If-else if statement:

==> The if-else if statement allows for multiple conditions to be checked in sequance if the if condition is false

==> The program checks the next else if condition,and so on

==> In else if statement,the condition are checked from top down if the first block returns true,the second,third block will not be checked

==> But if the first block return false,the second block will be checked

==> This condition checking continues untill a block returns a true outcome

Example program:

package day1if;

public class IfElseIfStatement 
 {
public static void main(String [] args) 
 {          
int num1 = 20, num2 = 20; 
if(num1 > num2) 
 {
System.out.println("num1 is greater than num2");
 }
else if(num1 == num2) 
 {
System.out.println("num1 is equal to num2");
 } 
else
 {
System.out.println("num1 is less than num2");
 } 
 }
 }

Output:

num1 is equal to num2

Nested if ststement:

==> Nested if in Java refers to having one if statement inside another if statement.

==> If the outer condition is true the inner conditions are checked and executed accordingly.

==> Nested if condition comes under decision-making statement in Java, enabling multiple branches of execution

Example Program:

package javaprogram;

public class Nested {
  public static void main(String args[]) 
         {
    int a = 10;
    int b = 20;
  // Outer if condition
     if (a == 10) 
         {
        System.out.println("Geeks");
  // Inner if condition
     if (b < 20) 
         {
        System.out.println("GeeksforGeeks");
         } 
        else 
         {
        System.out.println("geek for geek");
     if (b <= 20) 
         {
    System.out.println("for");
     }
    }
       }
      }
     }

Output:

Geeks
geek for geek
for