find index of element in python list.md

find index of element in python list

In simple terms, index() method finds the given element in a list and returns its position.

However, if the same element is present more than once, index() method returns its smallest/first position.

Note: Index in Python starts from 0 not 1.

The syntax of index() method for list is:

list.index(element)

index() Parameters

The index method takes a single argument:

• element - element that is to be searched.

Return value from index()

The index() method returns the index of the element in the list.

If not found, it raises a ValueError exception indicating the element is not in the list.

Example

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

# element 'e' is searched
index = vowels.index('e')

# index of 'e' is printed
print('The index of e:', index)

# element 'i' is searched
index = vowels.index('i')

# only the first index of the element is printed
print('The index of i:', index)

When you run the program, the output will be:

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