Hello World Program in Java, Python & C Languages.

1. How to print Hello World! program in java?

Program

public class HelloWorld {
public static void main(String[] args){

    System.out.println("Hello, World!");
  }
}

The main method is the program's entry point in this programme. It prints the string "Hello, World!" to the console using the "System.out.println" instruction.

To launch the programme, save the code in a Java file with the extension.java (for example, "HelloWorld.java"). Then, launch a terminal or command prompt, navigate to the file's location, and execute the following command:

javac HelloWorld.java

This command compiles the Java file and creates the "HelloWorld.class" bytecode file. Run the following command to run the programme and view the output:

java HelloWorld

In the terminal, you should see the output "Hello, World!"

This is a simple example of how to print a message in Java using the "System.out.println" line. When learning the Java programming language, it is frequently the first programme that individuals write.

2. How to print Hello World! program in Python?

Program

print("Hello, World!")

When you run this programme, the console will display "Hello, World!"

To run the programme, store the code in a Python file ending in.py (for example, "hello_world.py"). Then, launch a terminal or command prompt, navigate to the file's location, and execute the following command:

python hello_world.py

In the terminal, you should see the output "Hello, World!"

This is a simple example of how to use Python's print function to print a message. It is frequently the first programme written when learning a new programming language.

3. How to print Hello World! program in C?

Program

#include <stdio.h> 
#include<conio.h>
int main() {
printf("Hello, World!\n");
return 0;
}

The printf function is used in this programme to print the string "Hello, World!" to the terminal. The n character signifies a newline, which adds a line break after the message.

To run the programme, save the code in a C file ending in.c (for example, "hello_world.c"). Then, using a C compiler, compile the C file. If you have GCC installed, for example, open a terminal or command prompt, navigate to the directory where the file is saved, and enter the following command:

gcc hello_world.c -o hello_world

This command compiles the C file and produces the executable file "hello_world." Run the following command to run the programme and view the output:

./hello_world

In the terminal, you should see the output "Hello, World!"

This is a simple example of how to print a message in C using the printf function. When learning the C programming language, it is frequently the first programme that individuals write.