Find the output of following: str1='wonderful' (i) print(str1[0:6]), (ii) print(str1[0:3]), (iii) print(str1[3:6]), (iv) print(str1[-1:-3]), (v) print(str1[-3:-1])?

Question

Answer

The number inside square bracket represents the position of a certain character in the given string. If there are two numbers seperated by a semi colon it means we have to print all the characters in between them including them. The first character is given the suffix 0, and then it goes on till the last.
(I) wonderf
(II) wond
(III) derf
If one the given number is negative it means we have to count from the last character. Example [-1] means the last but one character.
(IV) ufr
(IV) rfu

Answer

(i)wonderf
(ii)wond
(iii)derf
(iv)luf
(v)rfu

Answer

Forward indexing
0 1 2 3 4 5 6 7 8
W o n d e r f u l
backward indexing
-9 -8 -7 -6 -5 -4 -3 -2 -1
W o n d e r f u l
(i) 0:6= elements from index 0 to index 5
Wonder
(ii) 0:3= elements from index 0 to index 2
Won
(iii) 3:6= elements from index 3 to index 5
der
(iv) -1:-3= element from index -1 to index -3
ufr
(v) -3:-1= element from index - 3 to - 1
rfu

Answer

The given string is 'wonderful'. Let's analyze each part of the code and find the output for each:

(i) str1[0:6]: This code snippet will print the substring starting from index 0 and ending at index 5 (excluding index 6). The output will be 'wonder'.

(ii) str1[0:3]: This code snippet will print the substring starting from index 0 and ending at index 2 (excluding index 3). The output will be 'won'.

(iii) str1[3:6]: This code snippet will print the substring starting from index 3 and ending at index 5 (excluding index 6). The output will be 'der'.

(iv) str1[-1:-3]: This code snippet might seem a bit confusing, but it's important to understand how negative indices work in Python. Negative indices count from the end of the string, where -1 represents the last character. In this case, -1 represents the 'l' in 'wonderful', and -3 represents the 'd'. However, when using slicing, the start index should come before the end index. Since -1 is the last character and -3 is before it, the output will be an empty string.

(v) str1[-3:-1]: Similar to the previous code snippet, this code will print a substring. Here, -3 represents the 'f' in 'wonderful', and -1 represents the 'l'. The output will be 'fu'.

In summary, the outputs for each part of the code are:
(i) 'wonder'
(ii) 'won'
(iii) 'der'
(iv) ''
(v) 'fu'

It's important to note that when slicing a string, the start index is inclusive, and the end index is exclusive. Additionally, negative indices count from the end of the string.

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