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Python find

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

In this section, we discuss how to write a find string Function in Python Programming with example.

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

Python find String Syntax

The basic syntax of the Python find function is:

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, the python find function considers Zero as a starting position.
  • Ending_Position: This is an optional parameter. If you want to specify the endpoint (Ending index position) then, Please specify the index value here. If you Omit this parameter then, find Function consider the highest index number.

Python find Substring Example

The following set of examples 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

The following statement finds 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 returns -1

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

The Python find function allows us to use the Starting index position. By specifying the starting index position, we can increase 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 the starting and ending index positions, we can increase the performance. The following statement starts looking for ‘abc’ from index position 12.

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

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

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