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<!-- making C cheatsheets -->
### main() Function
```main() Function```
* The main() function is the starting point of the program: ```int main (int argc, char *argv[])```
* The return type of the main() function is an integer (type int) and it is known as the ```return value``` of the program.
* As a rule of thumb, ```value 0 means success while non-zero means an error conditions.```
* The main() function is the starting point of the program: `int main (int argc, char *argv[])`
* The return type of the main() function is an integer (type int) and it is known as the `return value` of the program.
* As a rule of thumb, `value 0 means success while non-zero means an error conditions.`
---
## Include Files
* The `purpose` of these files is to tell the compiler about the existence of external functions which the source code will make use of.
* The purpose of these files is to tell the compiler about the existence of external functions which the source code will make use of.
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## Create and execute a program
In Linux systems:
1. Open up a terminal (Ctrl + Alt + T)
2. Create the program: nano nameProgram.c
3. Write the program and save it
4. gcc -o nameExecutable nameProgram.c (eg: gcc -o nameProgram_output nameProgram.c
)
4. gcc -o nameExecutable nameProgram.c (eg: gcc -o nameProgram_output nameProgram.c)