Python is a dynamic-typed language, which skill we do not want to mention the variable kind or declare earlier than the usage of it. It makes to Python the most environment friendly and handy to use language. Every variable is handled as an object in Python.
Before declaring a variable, we should observe the given rules.
The first character of the variable can be an alphabet or (_) underscore.
Special characters (@, #, %, ^, &, *) should not be used in variable name.
Variable names are case sensitive. For example – age and AGE are two different variables.
Reserve words cannot be declared as variables.
Let’s understand the announcement of a few primary variables.
Python supports three kinds of numbers – integer, floating point numbers, and complex. We can declare a variable with any length, there is no restrict proclaims any size of the variable. Use the following syntax to declare the quantity type variables.
num = 25 print("The type of a", type(num)) print(num) float_num = 12.50 print("The type of b", type(float_num)) print(float_num) c = 2 + 5j print("The type of c", type(c)) print("c is a complex number", isinstance(1 + 3j, complex))
The type of a <class 'int'> 25 The type of b <class 'float'> 12.5 The type of c <class 'complex'> c is a complex number True
The string is the sequence of Unicode characters. It is declared the use of single quotes, double quotes, or triple quotes. Let’s recognize the following example.
str_var = 'JavaTpoint' print(str_var) print(type(str_var)) str_var1 = "JavaTpoint" print(str_var1) print(type(str_var1)) str_var3 = '''''This is string using the triple Quotes''' print(str_var3) print(type(str_var1))
JavaTpoint <class 'str'> JavaTpoint <class 'str'> This is string using the triple Quotes <class 'str'>
- Assigning a couple of values to multiple variables
We can assign the more than one variable concurrently on the equal line. For instance –
a, b = 5, 4 print(a,b)
Values are printed in the given order.
2 Assign a single cost to the a couple of variables
We can assign the single fee to the multiple variables on the identical line. Consider the following example.
a=b=c="JavaTpoint" print(a) print(b) print(c)
JavaTpoint JavaTpoint JavaTpoint