Lecture 2 | Variables in Java | Input Output | Complete Placement Course

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public class Main {
    public static void main(String[] args) {
        System.out.print("Hello World");
    }
}

//output: Hello World

public class Main {
    public static void main(String[] args) {
        System.out.print("Hello World with Java");
    }
}

//output: Hello World with Java

public class Main {
    public static void main(String[] args) {
        System.out.print("Hello World with Java");
        System.out.print("Hello World with Java");
    }
}

//output: Hello World with JavaHello World with Java

//println
public class Main {
    public static void main(String[] args) {
        System.out.println("Hello World with Java");
        System.out.println("Hello World with Java");
        System.out.print("Hello World with Java");
    }
}

//output:
//        Hello World with Java
//        Hello World with Java
//        Hello World with Java

//BACKSLASH N "\n"
public class Main {
    public static void main(String[] args) {
        System.out.print("Hello World with Java\n");
        System.out.print("Hello World with Java\n");
        System.out.print("Hello World with Java");
    }
}

//output:
//        Hello World with Java
//        Hello World with Java
//        Hello World with Java

//\n between words
public class Main {
    public static void main(String[] args) {
        System.out.print("Hello World with java \nfrom \nApni Kaksha");
    }
}

//output:
//        Hello World with java
//        from
//        Apni Kaksha

# Revise 
//Three way to print output in Java
//1. print
//2. println
//3. "\n"

//# question: print the pattern
public class Main {
    public static void main(String[] args) {
        //output
        System.out.println("*");
        System.out.println("**");
        System.out.println("***");
        System.out.println("****");
    }
}

//output:
//        *
//        **
//        ***
//        ****

//NOTE: type sout and press enter to print the print statement shortcut

//# QUIZ: PRINT THE STARS
public class Main {
    public static void main(String[] args) {
        System.out.println("*");
        System.out.println("**");
    }
}

variables in java


public class Main {
    public static void main(String[] args) {
        //variables
        String name = "tony stark";
        System.out.println(name);
        int a = 25;
        int b = 10;
        int age =  48;
        System.out.println(a);
        System.out.println(b);
        System.out.println(age);

        double price = 25.5;
        System.out.println(price);

        // change b and name value
        b = 20;
        name = "ironman";
        System.out.println(b);
        System.out.println(name);
    }
}

// code for sum of two numbers
public class Main {
    public static void main(String[] args) {
        int a = 10;
        int b = 25;
        int sum = a + b;
        System.out.println(sum);
    }
}

//code for product of two numbers
public class Main {
    public static void main(String[] args) {
        int a = 10;
        int b = 25;
        int mul = a * b;
        System.out.println(mul);
    }
}

//quiz option solution
public class Main {
    public static void main(String[] args) {
        int a = 10;
        int b = 5;
        int ans = a * b / a - b;
        System.out.println(ans);
    }
}

 //output: 0

public class Main {
    public static void main(String[] args) {
        int a = 10;
        int b = 5;
        int ans = (a*b)/(a-b);
        System.out.println(ans);
    }
}

//output: 10

//taking input in java using scanner class
import java.util.*;

public class Main {
    public static void main(String[] args) {
        //Input
        Scanner sc = new Scanner(System.in);
        String name = sc.next();
        System.out.println(name);
    }
}
//output:
//input      tony stark 
//output     tony

 //taking input using next line code

import java.util.*;
public class Main {
    public static void main(String[] args) {
        //Input
        Scanner sc = new Scanner(System.in);
        String name = sc.nextLine();
        System.out.println(name);
    }
}

//output:
//        tony stark and iron man
//        tony stark and iron man

import java.util.*;
public class Main {
    public static void main(String[] args) {
        //Input
        Scanner sc = new Scanner(System.in);
        int a = sc.nextInt();
        int b = sc.nextInt();
        int sum = a + b;
        System.out.println(sum);

    }
}

//output:
//        100
//        100
//        200