Month: October 2020

Exercise 77 Write a Python algorithm which determines the first index of an existing occurrence within a given string s without using any predefined method as find() or rfind()... The algorithm must return -1 if the occorrence does not exist within the string s. Example if s = "Python programming language", and occ = "prog"…

Exercise 76 Write a python algorithm that transform a given string s by swapping the second character (s[1]) with the befor last character. We assume that len(s) is greater or equal than 4. Example if s = "Python" , the algorithm returns the string: "Pothyn". Solution def swapping(s): n = len(s) s_swap = s[0] +…

Exercise 75 Write a python algorithm which determines the list of all common characters to two strings s1 and s2 without repetition. Example if s1 = "Python language" and s2 = "Programming", the algorithm returns the liste ['P', 'o', 'n', 'a', 'g'] ( the charcter 'g' must be added only once even if shared twice)…

Exercise 74 Write a Python program that replace the characters with odd index of a given string by '#'. Exemple if s = "Python" , the algorithm returns the string: "P#t#o#" Solution def replace(s): n = len(s) # initializing desired string new_string = "" # iterate over all characters of string s for i in…

Exercie 73 Write a python algorithm which delete all vowels from a given string s. Example if s = "Python is hight level programming language", the algorithm returns the string: "Pthn s hght lvl prgrmmng lngg" Solution def deleteVowels(s): # define the liste of vowels vowels = ['a','e','y','u','i','o'] # initializing the string without vowels s1…