How to check if type of a variable is string? – python

In Python, you can check if the type of a variable is a string using the built-in isinstance() function. This function checks whether an object is an instance of a specific class or a subclass thereof.

Syntax:

isinstance(variable, str)

• variable: The variable you want to check.
• str: The type you are checking for, in this case, the str type (which represents strings in Python).

Example:

# Example variables
var1 = "Hello, World!"
var2 = 123
var3 = 45.6

# Check if the variable is a string
print(isinstance(var1, str))  # Output: True
print(isinstance(var2, str))  # Output: False
print(isinstance(var3, str))  # Output: False

Explanation:

• isinstance(var1, str) returns True because var1 is a string.
• isinstance(var2, str) and isinstance(var3, str) return False because var2 is an integer and var3 is a float, not strings.

Alternative Using type()

Another method is to use the type() function, but it’s generally recommended to use isinstance() because it handles inheritance and subclasses better.

# Check if variable is of type string using type()
print(type(var1) == str)  # Output: True

However, isinstance() is more flexible and preferred in most cases.