Data Types and Instruction in C Language

Data Type in C language

Int -data types

Integers are whole number that can have both positive and negative values but no decimal values.

for example -- 0, -3, 10

In c keyword int is used for declaring integer variable. for example-- int a;

Here, a is a variable of type integer.

You can declare multiple variable at once in C. For example -- int a, b, c;

The size of int is either 2 bytes or 4 bytes. If you consider an integer having size of 4 byte(equal to 32

bits), it can take 232

Similarly, int of 2 bytes, it can take 216 

Float - data type

Float type variables can hold real numbers such as: 2.34, -9.3 etc. You can declare a decimal variable in C by using either float or double keyword. for example:

float amount; or double amount ;

Difference between float and double: The size of float (single precision float type)is 4 bytes and double(double precision float type) is 8 bytes.

Char - Character types

Keyword char is used for declaring character type variables. for example:

char ch= 'a';

Here, ch is character variable. The value of ch is 'a'. And size of character variable is 1 byte.

INSTRUCTIONS

DATA TYPE DECLARATION INSTRUCTION

                                                  (As we discuss in previous lecture)

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