- It takes 10 bytes in memory.
- Used to store very large floating values.
- Character data type consists of alphabetic characters, numeric digits and special character.
- It takes 1 byte in memory.
Declaration of Variables
- Name of a variable and the Variable Type it can hold is called declaration of the variable
- When a variable is declared, it occupies some memory space according to its data type.
- Value of variable is stored in this memory.
- (e.g) n Int marks;
Data Type Variable Name
- Short int Marks;
- Long int Length;
- Float Height;
- Double Distance;
- Char Single;
- Int Marks, Rollno, Age;
Initialization of Variables:
- Assigning a value to variable at declaration time is called initialization of the variable.
- (e.g) Int a=110, b=60, c; Float num=6.78f; Char sin=‘M’;
- Compiler can’t read these statements.
- Used to add remarks or comments in a program.
- Usually given to explain logic of program.
- For Single line comment
- // comments
- For multi line comments
/* comments comments */
- (e.g.) c=a +b; // Addition of two numbers
INPUT AND OUTPUT STATEMENTS:
- Statements that are used to provide data to the program during its execution are called input statements.
- Function used for input are
– scanf Function
– gets Function
– getch Function
– getche Function
- Statements that are used to show data to an output device are called output statements.
- Function used for output are
– printf Function
– puts Function
- scanf and printf are most common used functions.
- These functions are defined in the “Stdio.h” header file.