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How to Return Index of item in list on Python?

joshuabrown0010 profile image joshua-brown0010 ・1 min read

The index() technique returns the index of the required element within the list.

The syntax of the list index() technique is:

list.index(element, start, end)
list index() parameters

The list index() technique can take a most of 3 arguments:

 element - the detail to be searched    
start (optional) - begin looking from this index
 end (optional) - seek the detail as much as this index
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Return Value from List index()

 The index() technique returns the index of the given element within the list.   
 If the element isn't found, a ValueError exception is raised.
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Note: The index() technique most effectively returns the primary prevalence of the matching element

# vowels list
vowels = ['a', 'e', 'i', 'o', 'i', 'u']

# index of 'e' in vowels
index = vowels.index('e')
print('The index of e:', index)

# element 'i' is searched
# index of the first 'i' is returned
index = vowels.index('i')

print('The index of i:', index)
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Output

The index of e: 1
The index of i: 2

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