what is if statement || Conditional statement.

• Conditional Statements

• If statement 

Conditional statement

•  These are statements within our program which are conditionally executed .
•  To conditionally execute statement java provides us different control structures and operators.

  if statement 

 switch statement 

 Ternary/conditional operator

If statement

• It is used to conditionally execute a block of statements.

Syntax:- 

if(condition)            

{

 statements

 ………………. 

} 

else 

{

 statements 

……………….. 

} 

next statement

 -> If condition is true then statements within if block are                                                                   executed and then program control is transferred to next statements.

->If condition is false then statements within else block are executed and then program control is transferred to next statements.

else part is optional.

Boolean expressions

• Condition can be specified by using a Boolean expression i.e. an expression whose result is true or false

• Boolean expression can be created by using relational and logical operators
• Relational Operators: < , > , <= , >= , == , !=
•  Logical Operators : && , || , !

• WAP to read a number and check if it is an even or odd.

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%2==0)
                System.out.println("Number is EVEN");
            else
                System.out.println("Number is ODD");
        }
    }

output:- 

Enter a Number: 8
Number is EVEN

WAP to read 3 angles and check if triangle can be formed 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 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");
        else
            System.out.println("Triangle cannot be formed");
    }
}
output:- 
Enter 3 angles:100 60 20
Triangle can be formed



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