Variable:
Any storage space or memory region in a program is referred to as a variable.
In plain English, we may say that a variable is a container that holds some data, and that we use the name of that container to retrieve the data anytime we need it. We’ll make a variable now:
a = 34 # Variable storing an integer
b = 23.2 # Variable storing real number
Here, the variables a and b can be used to obtain 23.2 and 34, respectively. Alternatively, we might change the values in a and b.
Data Types:
The following data types are the most common ones.
- Integers (of the “int” class”): Used to hold integers.
- Decimal or floating-point numbers are stored using floating point numbers (class “float””).
- Strings (of the’str’ class): Used to hold strings.
- Booleans (of the ‘bool’ class): Used to store values of the True/False type.
- None: None in Python literally means “Nothing.”
Python’s definition of a variable is as follows:
- The characters in a variable name can be letters, numbers, and underscores (_). demo_xyz = “It’s a string variable,” as an example.
- Only an alphabetic character and an underscore may begin a variable name.
- It cannot be the first digit. For instance, 5rahul is prohibited and illegal.
- Within a variable name, no white space may be used.
- Additionally, it is not advised to utilize restricted words as variable names.
- Tom, _demo, de_mo, and other examples of acceptable variable names are provided.
Python is a terrific language that does the automatic data type identification for us. It implies that we must enter some data into a variable, and Python knows what kind of data a variable is holding on its own.
# Variable in Python:
abc = “It’s a string variable”
_abcnum = 40 # It is an example of int variable
abc123 = 55.854 # It is an example of float variable
print(_abcnum + abc123) # This will give sum of 40 + 55.854
