1. There are many Conditional Statement Blogs but Most exciting one is here

2. If-Else Statement

if-else statement is worked as either-or condition. if the given condition is true then it will execute block of code else it will execute else block.

Syntax of if-else conditional statement

if(condition/expression){
     // Body - Statements inside the block will execute if the given condition is true/correct
}
else{
    // Body - Statements inside the block will execute if the given condition is false/wrong
}

Flow chart of If-Else statement

How it works?

Step-1 : Start of the program.
Step-2 : Check the given expression/condition whether it is satisfied or not.
Step-3 : Conditional – if the given condition is satisfied and it return true then execute block A
Step-4 : Conditional – if the given condition is not satisfied and it return false then execute block B
Step-5 : End of Program

How to use if statement in Java/C/C++ ?

// - Java Programming Example 
public class Main {
    public static void main(String[] args) {
        // TODO: Example of If statement
        System.out.println("First Example");
        if(5 > 3){ // is 5 more than 3 -- Yes - returns true
            System.out.println("5 is bigger than 3");
        }else{
            System.out.println("3 is smaller than 5");
        }
        System.out.println("End of first example");

        System.out.println("---------------------------------");
        System.out.println("Second Example");
        if(5 < 3){ // is 3 more than 5 -- No - returns False
            System.out.println("5 is bigger than 3");
        }else{
            System.out.println("3 is smaller than 5");
        }
        System.out.println("End of first example");
    }
}


// - C/C++  programming Example 

int main()
{
        // TODO: Example of If statement
        printf("First Example\n");
        if(5 > 3){ // is 5 more than 3 -- Yes - returns true
            printf("5 is bigger than 3\n");
        }else {
            printf("3 is smaller than 5\n");
        }

        printf("---------------------------------\n");
        printf("First Example\n");
        if(5 > 3){ // is 5 more than 3 -- Yes - returns true
            printf("5 is bigger than 3\n");
        }else {
            printf("3 is smaller than 5\n");
        }
        printf("End of first example");
}

Output :

First Example
5 is bigger than 3
End of first example
———————————
Second Example
3 is smaller than 5
End of first example

When to use?

When there is a scenario where programmer want to execute block of code based on either-or codition then they can use if-else statement. if the given condition is true then block A will be executed or block B will be executed.