During programming, sometimes, we can have such a problem in which it is required that the first word from the string has to be removed. These kinds of problems are common and one should be aware about the solution to such problems. Let’s discuss certain ways in which this problem can be solved.
Method #1: Using split() Method
This task can be performed using the split function which performs a split of words and separates the first word of string with the entire words.
Python3
# Python3 code to demonstrate working of# Removing Initial word from string# Using split()# initializing string test_str = "Lazyroar is best"# printing original string print("The original string is : " + test_str)# Using split()# Removing Initial word from stringres = test_str.split(' ', 1)[1]# printing result print("The string after omitting first word is : " + str(res)) |
The original string is : Lazyroar is best The string after omitting first word is : is best
Time complexity: O(1)
Auxiliary space: O(1)
Method #2: Using partition() Method
The partition function is used to perform this particular task in the comparatively lesser internal tasks as compared to the function used in the above method.
Python3
# Python3 code to demonstrate working of# Removing Initial word from string# Using partition()# initializing stringtest_str = "Lazyroar is best & quot# printing original stringprint(& quot The original string is : & quot + test_str)# Using partition()# Removing Initial word from stringres = test_str.partition(' ')[2]# printing resultprint(& quot The string after omitting first word is : & quot + str(res)) |
The original string is : Lazyroar is best The string after omitting first word is : is best
Method #3: Using join() and split() methods
Python3
# Python3 code to demonstrate working of# Removing Initial word from string# Using split() and join()# initializing stringtest_str = "Lazyroar is best"# printing original stringprint("The original string is : " + test_str)# Using split() and join()# Removing Initial word from stringx = test_str.split()res=" ".join(x[1:])# printing resultprint("The string after omitting first word is : " + str(res)) |
The original string is : Lazyroar is best The string after omitting first word is : is best
Method #4: Using pop() function
Python3
# Python3 code to demonstrate working of# Removing Initial word from string# initializing stringtest_str = "Lazyroar is best"# printing original stringprint("The original string is : " + test_str)x = test_str.split()x.pop(0)res = ' '.join(x)# printing resultprint("The string after omitting first word is : " + str(res)) |
The original string is : Lazyroar is best The string after omitting first word is : is best
Time Complexity: O(N)
Auxiliary Space: O(N)
Method #5: Using index() function
Python3
# Python3 code to demonstrate working of# Removing Initial word from string# Using slicing# initializing stringtest_str = "Lazyroar is best"# printing original stringprint("The original string is : " + test_str)# Removing Initial word from string# Using slicingres = test_str[test_str.index(" ")+1:]# printing resultprint("The string after omitting first word is : " + str(res))#This code is contributed by Edula Vinay Kumar Reddy |
The original string is : Lazyroar is best The string after omitting first word is : is best
Time Complexity: O(N), where N is the length of the string.
Auxiliary Space: O(1), as we are just using a few variables for storing intermediate results.
Method 6 : using the find() method and string slicing.
- Initialize the string.
- Use the find() method to find the index of the first space character.
- Use string slicing to extract the substring after the first space character.
- Print the resulting string.
Python3
# Python3 code to demonstrate working of# Removing Initial word from string# Using find() method# initializing stringtest_str = "Lazyroar is best"# printing original stringprint("The original string is : " + test_str)# Removing Initial word from string# Using find() methodindex = test_str.find(' ')res = test_str[index+1:]# printing resultprint("The string after omitting first word is : " + str(res)) |
The original string is : Lazyroar is best The string after omitting first word is : is best
Time complexity: O(n) – where n is the length of the string.
Auxiliary space: O(1) – constant extra space is used.
