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Python | Longest String in list
  • Last Updated : 11 Dec, 2019

Sometimes, while working with Python Lists, we can have a problem in which we receive Strings as elements and wish to compute the String which has maximum length. This kind of problem can have applications in many domains. Let’s discuss certain ways in which this problem can be solved.

Method #1 : Using loop
This is the brute method in which we perform this task. In this, we run a loop to keep a memory of longest string length and return the string which has max length in list.




# Python3 code to demonstrate working of
# Longest String in list
# using loop
  
# initialize list 
test_list = ['gfg', 'is', 'best', 'for', 'geeks']
  
# printing original list 
print("The original list : " + str(test_list))
  
# Longest String in list
# using loop
max_len = -1
for ele in test_list:
    if len(ele) > max_len:
        max_len = len(ele)
        res = ele
  
# printing result
print("Maximum length string is : " + res)
Output :
The original list : ['gfg', 'is', 'best', 'for', 'geeks']
Maximum length string is : geeks

 

Method #2 : Using max() + key
This method can also be used to solve this problem. In this, we use inbuilt max() with “len” as key argument to extract the string with the maximum length.






# Python3 code to demonstrate working of
# Longest String in list
# using max() + key
  
# initialize list 
test_list = ['gfg', 'is', 'best', 'for', 'geeks']
  
# printing original list 
print("The original list : " + str(test_list))
  
# Longest String in list
# using max() + key
res = max(test_list, key = len)
  
# printing result
print("Maximum length string is : " + res)
Output :
The original list : ['gfg', 'is', 'best', 'for', 'geeks']
Maximum length string is : geeks

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