If Else Example Java Program

Definition

IF conditional statement is a feature of this programming language which perform different computations or actions depending on whether a programmer-specified boolean condition evaluates to true or false. Apart from the case of branch predication, this is always achieved by selectively altering the control flow based on some condition.

Syntax

if statements in Java are similar to those in C and use the same syntax:
	if (expression) {
		doSomething();
	}
	else	{
		doSomethingElse();
	}

Syntax Example

for example,
	if (i == 3) {
		doSomething();
	}
	else	{
		doSomethingElse();
	}

Syntax Explanation

Consider above example syntax,if (i == 3)

which means the variable i contains a number that is equal to 3, the statements following the doSomething() block will be executed.
Otherwise variable contains a number that is not equal to 3, else block doSomethingElse() will be executed.

If Else Example Program

import java.util.Scanner;

class IfElseExample{
    public static void main(String[] args){
        Scanner in=new Scanner(System.in);
        System.out.println("Enter the number: ");
        int num=in.nextInt();
        if(num==5){
            System.out.println(" Condition of "+num+" equal to 5 is : True ");
        }
        else{
            System.out.println(" Condition of "+num+" equal to 5 is: False ");
        }
    }
}

Sample Output

Output is:
Enter the number:
56
 Condition of 56 equal to 5 is: False

Note

General Programming Note for If Else,

The if?else construct (sometimes called if?then?else) is common across many programming languages.
Although the syntax varies quite a bit from language to language, the basic functionality is same.