Question

Consider the following string mySubject:

mySubject = "Computer Science"

What will be the output of the following string operations :

i. print(mySubject[0:len(mySubject)])

ii. print(mySubject[-7:-1])

iii. print(mySubject[::2])

iv. print(mySubject[len(mySubject)-1])

v. print(2*mySubject)

vi. print(mySubject[::-2])

vii. print(mySubject[:3] + mySubject[3:])

viii. print(mySubject.swapcase())

ix. print(mySubject.startswith('Comp'))

x. print(mySubject.isalpha())

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Answer

i. print(mySubject[0:len(mySubject)])

This operation slices the string from the start to the end.

Output: Computer Science

ii. print(mySubject[-7:-1])

This operation slices the string from the 7th last character to the 2nd last character (both inclusive).

Output: Scienc

iii. print(mySubject[::2])

This operation slices the string with a step size of 2, meaning it takes every second character.

Output: Cmue cec

iv. print(mySubject[len(mySubject)-1])

This operation prints the last character of the string (len(mySubject)-1 equals the index of the last character).

Output: e

v. print(2*mySubject)

This operation prints the string twice.

Output: Computer ScienceComputer Science

vi. print(mySubject[::-2])

This operation slices the string in reverse order with a step size of 2.

Output: ecneScp

vii. print(mySubject[:3] + mySubject[3:])

This operation concatenates the slices of the string from start to index 3 and from index 3 to the end. Essentially, it's the whole string.

Output: Computer Science

viii. print(mySubject.swapcase())

This operation swaps the case of each character in the string.

Output: cOMPUTER sCIENCE

ix. print(mySubject.startswith('Comp'))

This operation checks if the string starts with "Comp".

Output: True

x. print(mySubject.isalpha())

This operation checks if all characters in the string are alphabetic (it will return False because the string contains a space).

Output: False


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