C programming introduction
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C programming introduction
Before article we learned a few things about the history of the C programming language. This article about C programming Introduction.
- Find a code editor
- Default
- Hello world!
- Comments
- Variables
- Constants
Find a code editor
First we select the code editor to write the program.
- Code:: Blocks
- Eclipse
- CLion
- Visual Studio Code
- NetBeans
- Codelite
- Atom
In this lesson, we select to write a program Code::Blocks and you can download go below the link :
http://www.codeblocks.org/downloads/binaries/After the code::blocks install, follow this step for create a project.
Create new project → Select Console Application and Click Next → Click Next → Select C and Click Next → Select the Path → Finish
Default
Our main program write in the main () function, if you are create a other function you can write it above the main() function.
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Hello World!
In C use printf() function for output a any strings.
eg: printf(“Hello World!”);
If you want go to new line or blank line use a “\n” in printf() function.
Commects
In C, if commented one line use “//Comment” and commented more lines “/*Comment*/”.
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Variables
Few variable types in C language.
- int - Store whole numbers without decimal (1, 25, 351)
- double and float - Store decimal number (1.2 , 2.3568)
- char - Store single character ( a , A , z) {using single quoted}
- If you need store a words, use chat array
char name[] = "Name";
Such of variables have a different output ways.
- int - printf(“%d”, x);
- double - printf(“%lf”, y);
- float - printf(“%f”, z);
- char - printf(“%c”, a);
- char[] - printf(“%s”, name);
Constants
Constants are use for store not changing values, like a hours of day.
eg: const int hours = 24;
Variable will can change it value later, but constant’s value can’t change.