Example 1: Swap two numbers using temporary variable

public class SwapNumbers {

    public static void main(String[] args) {

        float first = 1.20f, second = 2.45f;

        System.out.println("--Before swap--");
        System.out.println("First number = " + first);
        System.out.println("Second number = " + second);

        // Value of first is assigned to temporary
        float temporary = first;

        // Value of second is assigned to first
        first = second;

        // Value of temporary (which contains the initial value of first) is assigned to second
        second = temporary;

        System.out.println("--After swap--");
        System.out.println("First number = " + first);
        System.out.println("Second number = " + second);
    }
}

Output:

--Before swap--
First number = 1.2
Second number = 2.45
--After swap--
First number = 2.45
Second number = 1.2

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public class QuotientRemainder {

  public static void main(String[] args) {

    int dividend = 25, divisor = 4;

    int quotient = dividend / divisor;
    int remainder = dividend % divisor;

    System.out.println("Quotient = " + quotient);
    System.out.println("Remainder = " + remainder);
  }
}

Output:

Quotient = 6
Remainder = 1

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Example: Find ASCII value of a character

public class AsciiValue {

    public static void main(String[] args) {

        char ch = 'a';
        int ascii = ch;
        // You can also cast char to int
        int castAscii = (int) ch;

        System.out.println("The ASCII value of " + ch + " is: " + ascii);
        System.out.println("The ASCII value of " + ch + " is: " + castAscii);
    }
}

Output

The ASCII value of a is: 97
The ASCII value of a is: 97

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Example: How to Print an Integer entered by an user:

import java.util.Scanner;

public class HelloWorld {

    public static void main(String[] args) {

        // Creates a reader instance which takes
        // input from standard input - keyboard
        Scanner reader = new Scanner(System.in);
        System.out.print("Enter a number: ");

        // nextInt() reads the next integer from the keyboard
        int number = reader.nextInt();

        // println() prints the following line to the output screen
        System.out.println("You entered: " + number);
    }
}

Output

Enter a number: 10
You entered: 10

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The least common multiple (L.C.M.) of two numbers is the smallest positive integer that is perfectly divisible by the two given numbers.

For example, the L.C.M. of 12 and 14 is 84.

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The highest common factor (H.C.F) or greatest common divisor (G.C.D) of two numbers is the largest positive integer that perfectly divides the two given numbers. For example, the H.C.F of 12 and 14 is 2.

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In the program below, we have used anonymous (lambda) function inside the filter() built-in function to find all the numbers divisible by 13 in the list.

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In this program we will display powers of the integer 2 using Python anonymous function.

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The user needs to press ENTER to complete each lap. The timer keeps counting till CTRL+SHIFT is pressed.For each lap we calculate the lap time by subtracting the current time from the total time at the end of the previous lap. The time() function of the time module, returns the current epoch time in milliseconds.

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To delete a file with this script, we can use the os module.It’s recommended to check with a conditional if the file exist before calling the remove() function from the module:

import os

if os.path.exists("<file_path>"):
  os.remove("<file_path>")
else:
  <code>

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