Introduction
The len() function prints out the length of the string (equivalent to the number of characters). And this function is built into Python. The performance of the program can be optimized when you use the len() function in Python. Because the number of elements in the object is difficult to calculate so len() was born to help you know that.
And we will guide you on how to use the len() function of Python as we did below. Hope you understand.
Example
list = ["cat", "dog", "pig"] x = len(list) print(x)
Output:
3
Definition
The len() function prints out the number of elements in the variable.
If it is a string, len() will return the number of characters of the string.
The syntax
len(object)
Parameter Values:
object: may be a string, a list, … (Required)
More examples
Example 1: The basic len() function
list = ["cat", "dog", "pig"]
# Apply len() function
x = len(list)
# Print out the result
print("Length =",x)
Output:
Length = 3
Example 2: The len() function with a string
string = "hello"
# Apply len() function
x = len(string)
# Print out the result
print("Length =",x)
Output:
Length = 5
Example 3: The len() function with a set
s = {5, 6, 7, 8}
# Apply len() function
x = len(s)
# Print out the result
print("Length =",x)
Output:
Length = 4
Conclusion
We have guided you on how to use the len() function in Python.
Thanks for referring!
Karim Buzdar holds a degree in telecommunication engineering and holds several sysadmin certifications including CCNA RS, SCP, and ACE. As an IT engineer and technical author, he writes for various websites.
