How to write helloworld in c language

In C language, the "Hello, World!" program is used to output the text "Hello, World!" and is the basic step in writing C programs. Specific steps include: creating a source file with the extension ".c"; writing code, including header files, main functions and output functions; using a C compiler to compile the source file; running the compiled program to output "Hello, World!" .

"Hello, World!" program in C language

In C language, "Hello, World !" program is the most basic step in writing a C program. It outputs the simple text "Hello, World!" and is often used in test environments or to verify the correctness of the compiler.

Steps:

1. Create source file: Use a text editor to create a new file with the extension ".c", For example "helloworld.c".
2. Write the code: Type the following code in the file:

<code class="c">#include <stdio.h>

int main() {
  printf("Hello, World!\n");
  return 0;
}</code>

3. Compile the code: Use a C compiler (such as gcc or clang) to compile source files. The command is usually as follows:

<code>gcc helloworld.c -o helloworld</code>

4. Run the program: Use the following command to run the compiled program:

<code>./helloworld</code>

Output:

After running the program, you will see the following output in the terminal window:

<code>Hello, World!</code>

Code explanation:

• include <stdio.h>: Includes the standard input/output library.
• int main(): The entry point of the program, the return type is an integer.
• printf("Hello, World!\n"): Use the printf() function to output "Hello, World!" to the console, \n represents a newline character.
• return 0;: Return 0 when the program exits normally.

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