# Python Numbers

As we know, programming languages have their prime things - Numbers, Data types, Strings, Variables, etc., which play a significant role in constructing a program.

When we say Numbers, we mean to say Python programming supports integers, floating point numbers and complex numbers. These are number-based data types that store various types of numeric values. Number objects get generated when programmers assign a value to them. For example:

Example:
``````variable_name1 = 10

variable_name2 = 6.2``````

These reference to number objects can also be deleted by using del statement. The syntax for "del" statement is:

Syntax:
`del variable_name[, variable_name2[….variable_name-N]`
In Python, the numeric variables are defined as:
• int
• float
• complex

All of them act as a class in Python, where integers and floating point/decimal values are separated based on the presence or absence of decimal point between the values. 6 is an integer whereas 6.2 is a floating point value.

## Types of Numerical Data Types

Python provides four distinctive numerical types. These are:

• signed int: include the range of both positive as well as negative numbers along with whole numbers without the decimal point.
• long int: a special type of integers is having unlimited size and is written like integer value before the letter L (either uppercase or lowercase).
• float (real values): They are used with a decimal point to represent real numbers, and that decimal point (dot) is used to divide the integer and the fraction.
• complex: are complex numbers that take the structure a+bJ where a and b are floating point numbers and that 'J' represent the square root of -1 (imaginary number).

## Type Conversion (Casting)

Python has the capability and feature to convert within an expression containing the mixture of different types of values internally.

• int(v): is used to convert any value 'v' to a plain integer
• long(v): is used convert a value 'v' to a long integer
• float(v): is used convert a value 'v' to floating point value
• complex(v): is used convert a value 'v' to the complex number having real part 'v' and imaginary part as 0
• complex(u,v): is used convert values u and v to the complex number with real part 'u' and imaginary part 'v'
Example:
``````x = 10.5
y = 5

#without type cast
print (x + y)

#after type cast
print (int(x) + y)``````
Output:
```15.5
15```

In the above example shows how float converted to an integer. 