int – Integer data types
Integers are whole numbers that can have both positive and negative values but no decimal values. Example: 0, -5, 10
In C programming, keyword int is used for declaring integer variable. For example:
Here, id is a variable of type integer.
You can declare multiple variable at once in C programming. For example:
int id, age;
float – Floating types
Floating type variables can hold real numbers such as: 2.34, -9.382, 5.0 etc. You can declare a floating point variable in C by using either float or double keyword. For example:
Here, both accountBalance and bookPrice are floating type variables.
In C, floating values can be represented in exponential form as well. For example:
float normalizationFactor = 22.442e2;
Difference between float and double
The size of float (single precision float data type) is 4 bytes. And the size of double (double precision float data type) is 8 bytes. Floating point variables has a precision of 6 digits whereas the precision of double is 14 digits.
char – Character types
Keyword char is used for declaring character type variables. For example:
char test = ‘h’;
Here, test is a character variable. The value of test is ‘h’.
The size of character variable is 1 byte.
Storage size and value rang of data types