Datatypes in C Language - Computer Programming and Utilization

1. Subject : CPU(2110003)
Topic – Datatypes in C Language
Branch : Electrical
Div – F Batch : F - 1
Prepared By : Parth Patel
Guided By : Prof. Raxit Jani

2. • "Data type can be defined as the type of data of
variable or constant store.“
• When we use a variable in a program then we
have to mention the type of data. This can be
handled using data type in C.
• Followings are the most commonly used data
types in C.

3. PRIMARY
DATATYPE
DERIVED
DATATYPE
USER DEFINED
TYPE
INTEGER
CHAR
FLOAT
VOID
ARRAY
POINTER
STRUCTURE
UNION
TYPEDEF
ENUM

6.  The void type has no values therefore we cannot
declare it as variable as we did in case of integer
and float.
 The void data type is usually used with function to
specify its type.

7. Keyword
Format
Specifier
Size Data Range
char %c 1 Byte -128 to +127
unsigned char %c 1 Bytes 0 to 255
int %d 2 Bytes
-32768 to
+32767
long int %ld 4 Bytes -231
to +231
unsigned int %u 2 Bytes 0 to 65535
float %f 4 Bytes
-3.4e38
to
+3.4e38
double %lf 8 Bytes
-1.7e38
to
+1.7e38
long double %Lf 10Bytes
-3.4e38
to
+3.4e38

8. • C language supports a feature where user can
define an identifier that characterizes an existing
data type.
• This user defined data type identifier can later be
used to declare variables.
• In short its purpose is to redefine the name of an
existing data type.

9. Syntax:
• typedef <type> <identifier>;
• typedef int marks;
• marks batch1,batch2;

10.  Syntax-
 enum identifier {value1,value2….valuen};
 The identifier is a user defined enumerated
datatype which helps to declare variables that can
have one of the value enclosed in braces.This is
known as enumeration.

11. • enum day { mon,tue,wed,thu,fri,sat,sun};
• day week_stat,week_end;
• week_stat = mon;
• week_end = fri;
• if(week_stat == tue)
{
week_end = sat;
}