Demo1.java

class Demo1 {
    public static void main(String a[]) {
        // 1. First Code In Java
        // System.out.println("Hello World");

        // =============================================

        // =============================================

        // 2. Variable In Java
        // int num1 = 3;
        // int num2 = 3;
        // int result = num1 + num2;
        // System.out.println(result);

        // =============================================

        // =============================================

        // 3. Data Types In Java
        // int i = 3;
        // byte b = 127;
        // short s = 555;
        // long l = 5665l;

        // float f = 5.5f;
        // double d = 5.8;

        // char c = 'a';

        // boolean bl = true;

        // =============================================

        // =============================================

        // 4. Literal In Java
        // int num = 0b101; // Binary Convert
        // int num = 0x8E; // Hexadecimal Convert
        // int num = 10_00_11;
        // double num = 100; // integer Convert
        // double num = 100e40; // Scientific Notation
        // System.out.println(num);
        // char c = 'a';
        // c++; // Increment Character
        // System.out.println(c);

        // =============================================

        // =============================================

        // 5. Type Conversion In Java
        // byte b = 127;
        // int i = b; // Byte to Integer
        // System.out.println(i);

        // int i = 5;
        // byte b = i; // Never works Integer to Byte
        // byte b = (byte) 5; // Integer to Byte
        // System.out.println(b);

        // int i = 555;
        // byte b = (byte) i;
        // System.out.println(b);

        // float f = 55.6f;
        // int i = (int) f;
        // System.out.println(i);

        // byte b1 = 100;
        // byte b2 = 2;
        // int result = b1 * b2;
        // System.out.println(result);

        // =============================================

        // =============================================

        // 6. Arithmetic Operators In Java
        // int num1 = 7;
        // int num2 = 5;
        // int result = num1 + num2;
        // int result = num1 - num2;
        // int result = num1 * num2;
        // int result = num1 / num2; // This gives the quotient of the division
        // int result = num1 % num2; // This gives the remainder of the division
        // System.out.println(result);

        // int i = 5;
        // i = i + 2;
        // i += 2;
        // i -= 2;
        // i *= 2;
        // i /= 2;

        // i++; // Post Increment
        // i--; // Post Decrement

        // ++i; // Pre Increment
        // --i; // Pre Decrement

        // System.out.println(i);

        // int result = ++i; // "i" is incremented first, & then the value of "i" is assigned to "result"
        // int result = i++; // The current value of "i" is assigned to "result", & then "i" is incremented
        // System.out.println(result);
    }
}