Introduction
27Aug Admin
Python is a programming language.
Python can be used on a server to create web applications.
It is used for:
- web development (server-side),
- software development,
- mathematics,
- system scripting.
Python Casting
27Aug Admin
Casting is when you convert a variable value from one type to another. This is, in Python, done with functions such as int() or float() or str().
Python is an object-orientated language, and as such it uses classes to define data types, including its primitive types.
Casting in python is therefore done using constructor functions:
- int()
This Python cast function is used to construct any integral number with the help of an integral literal, a string literal (obtained by rounding down the previous whole number), or a float literal (a whole number is represented by providing a string).
Example–
x = int(2)
y = int(4.8)
z = int(“8”)
print(x)
print(y)
print(z)
Output–
2
4
8
- float()
This construction function helps in the construction of any float number with the help of a float literal, an integral literal, or a string literal (if a float or an integer is represented by a string).
Example–
x = float(4)
y = float(7.8)
z = float(“5”)
w = float(“2.4”)
print(x)
print(y)
print(z)
print(w)
Output–
4.0
7.8
5.0
2.4
- str()
This construction function helps in the construction of any string with the help of a lot of different data types.
Example–
x = str(“s2”)
y = str(9)
z = str(5.0)
print(x)
print(y)
print(z)
Output–
s2
9
5.0
Python Numbers
27 Aug Admin
Three numeric types in python:
- int- Integers are whole numbers. They can be positive or negative. They must be without decimal values.
- float- A floating point number contain decimal points. It can be positive or negative
- complex- A complex number contains two part – real and imaginary. The imaginary part is written with the “j” suffix.
Example-
a = 4
b = 8.6
c = 2j
print(type(a))
print(type(b))
print(type(c))
Output-
<class ‘int’>
<class ‘float’>
<class ‘complex’>
Python Booleans
12 Apr Admin
Boolean values are the two constant objects True and False.
Example–
print(8 > 7)
print(5 == 2)
Output–
True
False
Python Strings
27Aug Admin
Strings are amongst the most popular types in Python. We can create them simply by enclosing characters in quotes. Python treats single quotes the same as double quotes. Creating strings is as simple as assigning a value to a variable. For example −
a = 'Hello World!'
You can display a string with the print() function:
x = “Welcome” #Assigning a string to a variable
print(x)
Output– Welcome
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