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Introduction
What is C Identifiers Characters in C Datatypes & Variables Structure of C Program How to install turbo C in windows XP? How to install turbo C in windows 7/8?
Introduction [cont'd]
How to Compile and Run? Header files C Tokens Escape sequence Keywords Storage class specifier Constants
Introduction [cont'd]
Volatile
Operators
Operators Arithmetic Operators Relational operators Logical operators Increment & Decrement Operators Assignment Operators Bitwise operators
Operators [cont'd]
Conditional Operator Sizeof Operator
Input Output Functions
printf Scanf Getch putch getche Putchar getchar
Input Output Functions [cont'd]
gets puts
Decision Statements
If If-Else Else-If Nested If-Else Switch Goto
Looping Statements
For While Do-While Break Continue
Arrays
What is Array? One Dimensional Two Dimensional Multi Dimensional
Strings
What is String? Strlen Strcpy Strcmp Strlwr Strupr Strchr
Strings [cont'd]
Strstr Strcat Strrev
User-defined Functions
What is Functions? Function prototype Defining a Function Simple Arguments Return Value Arguments with Return value
User-defined Functions [cont'd]
Call by value Call by reference Recursion Nesting Functions Arrays as Arguments
Structures and Unions
Define Structure Copying Structures Comparing two Structures Arrays of Structures Nested Structures Structure with Functions Define Union
Structures and Unions [cont'd]
Different between Struct and Union
Pointers
Define Pointers & Operator Operators in pointers Pointers Array Pointers as Function Arguments Functions Returning Pointers Pointers and Structures
Memory
Dynamic Memory Allocation Malloc Calloc Realloc Free
Files
What is Files? Write Files Read Files Append Files Error handling
# Preprocessor
What is preprocessor in C? #include #define #if and #else #elif #ifdef #ifndef
# Preprocessor [cont'd]
#undef
Datatypes & Variables in Introduction of Programming in C
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Define C datatype? 
Datatype is used to specify and allocate memory for variables. Datatype size is differ from machine to machine. C supports int, float, char and double datatypes. limits.h has all size range details for datatypes.
Define C variables? 
Variable is an identifier or user specified name stores a data value. Constant variables are unchanged during program execution.
Datatype details 
Datatype Usage Memory size Limits
int stores rounded decimal values 2 bytes 32, 768 to 32, 767
float stores decimal values 4 bytes 3.4e-38 to 3.4e+38
char stores a character 1 byte -128 to 127
double stores high ranges of decimal values 8 bytes 1.7e-308 to 1.7e+308
Variable declration Syntax 
Datatype [variable name 1],[variable name 2]...[variable name n];

Usage
int a,b,c;


Datatype variable-name = initial-value;
Usage
int a = 10;
Program
#include
void main(){
   int a,b,c;
   a = 10;
   b = 20;
   c = a + b;
   printf("C=%d",c);
}
Output 
C=30
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Introduction of Programming in C
Introduction of Programming in C
Introduction of Programming in C
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Files of Programming in C
Structures and Unions of Programming in C
Input Output Functions of Programming in C
Files of Programming in C
Files of Programming in C
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Files of Programming in C
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Files of Programming in C
Structures and Unions of Programming in C
Sub Lessons
int
float
char
double
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