Get element by index list C#
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26/12/2021
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Python List index()In this tutorial, we will learn about the Python List index() method with the help of examples. Show The index() method returns the index of the specified element in the list. Exampleanimals = ['cat', 'dog', 'rabbit', 'horse']# get the index of 'dog'
index = animals.index('dog')
print(index)
# Output: 1Syntax of List index()The syntax of the list index() method is: list.index(element, start, end)list index() parametersThe list index() method can take a maximum of three arguments:
Return Value from List index()
Note: The index() method only returns the first occurrence of the matching element. Example 1: Find the index of the element# vowels list vowels = ['a', 'e', 'i', 'o', 'i', 'u'] # index of 'e' in vowelsindex = 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)Output Example 2: Index of the Element not Present in the List# vowels list vowels = ['a', 'e', 'i', 'o', 'u'] # index of 'p' is vowelsindex = vowels.index('p')
print('The index of p:', index)Output ValueError: 'p' is not in listExample 3: Working of index() With Start and End Parameters# alphabets list alphabets = ['a', 'e', 'i', 'o', 'g', 'l', 'i', 'u'] # index of 'i' in alphabetsindex = alphabets.index('e') # 1
print('The index of e:', index)
# 'i' after the 4th index is searched
index = alphabets.index('i', 4) # 6
print('The index of i:', index)
# 'i' between 3rd and 5th index is searched
index = alphabets.index('i', 3, 5) # Error!
print('The index of i:', index)Output The index of e: 1 The index of i: 6 Traceback (most recent call last): File "*lt;string>", line 13, in ValueError: 'i' is not in list |