C Programming Tutorial

C PROGRAMMING TUTORIALS 

Hello and welcome to our site. Today's blog is about basics of C programming. C itself is a very basic language of computer. And if one masters in C then it becomes easy to access all languages.


                 

Features Of C Programming

• Preprocessor - Preprocessor are used to process files of C. It is denoted by "#".
• Header Files - Header files are files that contain functions declarations. The example - studio is a header file in C. Header files are used with .h extension.
• Data Types - Data types in C are of 2 types
• 1. Primary Data Types                      2. User Defined Data Types
• Primary Data Types - void, int, char, float
• User Defined Data Types - structure, union, pointer, array.
• Functions - C program can be viewed as a set of functions.
• Functions can be identified by "()".
• Example - main (), printf (). Note - main() is a compulsory function.
• Execution of programme starts from function main().
• Constants - A constant is a quantity that does not change during the program execution.
• There are 4 types of constants
• 1. Integer 2. Real 3. Character 4. String
• 1. Integer - Example- 3, 100, -89.
• 2. Real - Example- 12.1 , 0.45. 3.
• 3.Character - Character constant is denoted in single quotes. Example- 'S'. To access the characters, there are some pre-defined integer values in C which are known as ASCII values. A-Z = 67-90 a-z = 97-122 0-9 = 48-57
• 4. String - String constantly is denoted in double quotes.Example - "Ram".
• Keywords - Keywords are the words whose meaning has already been explained to the C compiler. We cannot use keywords as a variable name. Example- if, break, else.
• Variables - A variable can be considered as a name given to the location in memory where tge constant is stored. Note - Variable name should not be a keyword.
• Comments - Comments are used to understand purpose of any particular statement, group of statements or functions in the program. Comments are not the part of program execution. Comments start with /* and end with */.

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