Data Types | CS8251- Programming in c | Learn Hub
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The document explains data types in C programming, highlighting their importance in defining variable characteristics and operations. It details several built-in data types such as char, int, float, and double, along with their sizes and value ranges. Additionally, it covers user-defined data types using typedef and enumerations for creating more complex types.
Data Types | CS8251- Programming in c | Learn Hub
- 1. CS8251 PROGRAMMING in C C.MANOJKUMAR LEARN HUB
- 2.  A variable's data type determines the values that the variable can contain and the operations that can be performed on it.  Every variable must have a data type.  C supports several different types of data.
- 4. Data Type Size in Bytes Range Use char 1 –128 to 127 To store characters int 2 –32768 to 32767 To store integer numbers float 4 3.4E–38 to 3.4E+38 To store floating point numbers double 8 1.7E–308 to 1.7E+308 To store big floating point numbers
- 5.  The (typedef) feature allows users to define new data types that are equivalent to existing data types.  Once a user - defined data type has been established the new variables, arrays, structures etc., can be declared in terms of this new data types
- 6. typedef int age; age male, female;  In this declaration age is a user-defined data type, which is equivalent to type int.  age male, female;  is equivalent to writing  int male, female;
- 7.  An enumerated is a user defined data type like a structure ( or ) a union .  Its members are constants that are written as identifiers though they have signed integer values.  An enumeration may be defined  Syntax:  enum tag { member1 , members2 , .. member m} ;
- 8.  enumcolours{ black , blue , green , magenta , red , white , yellow };