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Python find

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The Python find function is one of the Python String Method which is used to return the index position of the first occurrence of a specified string. It will return -1, if the specified string is not found.

In this article we will show you, How to write find string Function in Python Programming with example.

TIP: The index position in Python string find Function will start from 0, Not 1.

Python find String Syntax

The basic syntax of the Python find function is as shown below:

String_Value.find(Substring, Starting_Position, Ending_Position)
  • String_Value: Please select the valid String literal.
  • Substring: Please specify the string you want to search for.
  • Starting_Position: This is an optional parameter. If you want to specify the starting point (starting index position) then, Please specify the index value here. If you Omit this parameter then, python find() Function will consider Zero as starting position.
  • Ending_Position: This is an optional parameter. If you want to specify the end point (Ending index position) then, Please specify the index value here. If you Omit this parameter then, find() Function will consider the highest index number

Python Find Substring Example

The following set of examples will help you understand the Find string in Python.

# Python find Method Example

Str1 = 'We are abc working at abc company';
Str2 = Str1.find('abc')
print('First Output of a find() method is = ', Str2)

# Performing find() function directly
Str3 = 'Find Tutorial at Tutorial Gateway'.find('Tutorial')
print('Second Output of a find() method is = ', Str3)

# Searching for Not existing Item
Str4 = Str1.find('Tutorial')
print('Third Output of a find() method is = ', Str4)

# Using First Index while finding the String
Str5 = Str1.find('abc', 12)
print('Fourth Output of a find() method is = ', Str5)

# Using First & Second Index while finding the String
Str6 = Str1.find('abc', 12, len(Str1) -1)
print('Fifth Output of a find() method is = ', Str6)

# Using First & Second Index while finding Non existing String
Str7 = Str1.find('abc', 12, 21)
print('Sixth Output of a find() method is = ', Str7)

OUTPUT

Python Find

ANALYSIS

First we declared the String variable Str1 and assigned corresponding value using following statement

Str1 = 'We are abc working at abc company';

Following statement will find all occurrence of a substring ‘abc’ inside the Str1 using Find() function and prints the output

Str2 = Str1.find('abc')
print('First Output of a find() method is = ', Str2)

If the find() function in Python does not find the specified string inside the Str1, it will return -1

Str4 = Str1.find('Tutorial')
print('Third Output of a find() method is = ', Str4)

The Python find function allows us to use Starting index position. By specifying starting index position we can increase the performance

Str5 = Str1.find('abc', 12)
print('Fourth Output of a find() method is = ', Str5)

The find() function in Python allows us to use Starting and ending indices. By specifying starting and ending index position we can increase the performance. Following statement will start looking for ‘abc’ from index position 12

Str6 = Str1.find('abc', 12, len(Str1) -1)
print('Fifth Output of a find() method is = ', Str6)

Following statement is returning -1 because, python find() function will start looking from 12 (means first abc is skipped) and end at index position 21. As we all know second abc is at position 22.

Str7 = Str1.find('abc', 12, 21)
print('Sixth Output of a find() method is = ', Str7)

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