Programming In C, 3rd Edition

The C Declarations 45

helps in allocating the memory. The variable can also be declared before main() such variables are

called external variables. The syntax of declaring a variable is as follows.

Syntax:

Data_type variable_name;

Example:

int age;

char m;

float s;

double k;

int a,b,c;

The int, char, float and double are keywords to represent data types. Commas separate the

variables, in case variables are more than one.

Table 2.11 shows various data types and their keywords.

Table 2.11 Data types and keywords

Data Types Keyword

Character

char

Signed character

signed char

Unsigned character

unsigned char

Integer

int

Signed integer

signed int

Unsigned ...