C language full course | c language revision

 BCA SYLLABUS AND QUICK REVISION NOTES

SOURCE: KHWAZA MUINUDDEEN CHISHTI AND LUCKNOW UNIVERSITY

subject ; c language complete notes

1. What is c language?

ans:c language is a middle level procedural programming oriented programming  language developed by  "DENNIS RITCHIE"  at "AT&T's in Bell labourties in 1972 in USA.

SYNTAX OF C LANGUAGE:

It is the basic syntax of c langauge:

 #include<stdio.h>

#include<conio.h>

void main()

{

statement;

   }

 syntax rule for C Program

• C is a case sensitive language so all programms in c written in lower case letter.
•  C statement must be end with a semicolon.
• Whitespace is used in C to describe blanks and tabs
• space is required between keywords and identifiers

Keywords

• Keywords are preserved words that have special meaning in C language.
• The meaning has already been described.
• These meaning cannot be changed.
• There are total 32 keywords in C language.

Identifiers

In C language identifiers are the names given to variables, constants, functions and user-define data. These identifier are defined against a set of rules.

Rules for making identifiers

• An Identifier can only have alphanumeric characters ( a-z , A-Z , 0-9 ) and underscore( _ ).
• The first character of an identifier can only contain alphabet( a-z , A-Z ) or underscore ( _ ).
• Identifiers are also case sensitive in C. For example name and Name are two different identifier in C.
  
  
  
• Keywords are not allowed to be used as Identifiers.

• Data types in C Language

  Data types specify how we enter data into our programs and what type of data we enter. C language has some predefined set of data types to handle various kinds of data that we use in our program. These datatypes have different storage capacities.

  C language supports 2 different type of data types Primary data types and Derived data types.

• Data types in C Language

  Data type specifies the size and value of data.

  C language supports 2 different type of data types Primary data types and Derived data types.

  Primary data types

   There are mainly five types of primary data types in c langauge...

•   int

• floAT 

• CHAR

• DOUBLE

• VOID

• secondary data types

•  arrays

•  functions

•  structures 

•  pointers.

• 
  

  

Variables in C Language

Variable is the name of memory location where the data stores.

A programmer can choose a meaningful variable name.

Example : average, height, age, total etc.

Rules to define variable name

• Variable name must be upto 8 characters.
• Variable name must not start with a digit.
• Variable name can consist of alphabets, digits and special symbols like underscore _.
• Blank or spaces are not allowed in variable name.
• Keywords are not allowed as variable name.

Declaration of variable

Before making programm we have to declare the variable.

We have keep two things in our mind before declaring variable.

• It tells the compiler what the variable name is.
• It specifies what type of data the variable

#include<stdio.h>
#include<conio.h>
void main()
{
    int a,b,sum;    //variable declaration
    a=30;
    b=20;
    sum=a+b;
    printf("Sum is %d",sum);}
    getch();

So hey friends this blog was the about basic things in c language. I have made this notes by own and i am gonna to share c langauge full notes for quick revision...

I will ,ake 2 other post for c language ...

I hope you enjoy this article ,if yes then share it with your friends and i will see you soon 

----student of KMCLUBCA 1ST YEAR