Overview of C , Importance of C, C program structure, executing C program. Variables, Data Types, Constants: integer constant, real constant, character constant, string constant, Character set, C tokens, keywords and identifiers, variables declaration, Assigning values to variables—Assignment statement, declaring a variable as constant, as volatile. 

Operators and Expression Categories of operator- Arithmetic, Relational, logical, assignment, increment, decrement, conditional, bitwise and special operators; arithmetic expressions, precedence and associativity of operators, type conversions, mathematical functions.

Decision Making and Branching Statement  if statement, statement, nested statement ,  statement, go to statement.

Decision Making and Looping  Definition of loop, categories of loops, for loop while loop, do-while loop, break statement, continue statement.

Arrays Declaration and accessing of one & two-dimensional arrays, initializing two-dimensional arrays, multidimensional arrays.

Functions The form of C functions, Return values and types, return statement, calling a function, categories of functions, Nested functions, Recursion, functions with arrays, call by value, call by reference , storage classes. 

Structures and Unions Defining, giving values to members, initialization and comparison of structure variables, array of structure, array within structure, structure within structure, structures and functions, unions.

Pointers Definition of pointer, declaring and initializing pointers, accessing a variable through address and through pointer, pointer expressions, pointer increments and scale factor, pointers and arrays, pointers and functions, pointers and structures. 

File Management in C  Opening, closing and I/O operations on files, random access to files, command line arguments.