Cours Python
Exercise 21 Write a Python program to count the number of vowels in a given string. Example for the string s='unconstitutionally' the program must return the following message: "The string unconstitutionally has 8 vowels".
Exercise20 Write a Python program, to swap the first and the last character of a given string. Solution
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# define an example of string s s = "Python" # get the length of the string s n = len(s) # get the first character of the string s first = s[0] last = s[n-1] # extract the substring obtained from s ignoring the first and the last character s1 = s[1:n-1] # construct a new string by changing the first and last character s2 = last + s1 + first print(s2) # output: 'nythoP' |
Younes Derfoufi CRMEF OUJDA
Exercise 19 Write a Python algorithm that list the strings that make up the list l = ["laptop", "iphone", "tablet"] while indicating the length of each string. Solution
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l = ["laptop", "iphone", "tablet", "printer", "Ipad"] # iterate through the elements of the list l for x in l: print(x, " is in list l, its length is: ", len(x)) |
Younes Derfoufi CRMEF OUJDA
Exercise 14 Write a python program that asks the user to enter an integer n and display whether this number is a perfect square or not.
Exercise 18 Write a program in Python that asks the user to enter a string of characters s and send back a message indicating whether the string contains the letter 'a' while indicating its position on the string. Example if the user types the string s = 'language' the program returns: The letter 'a' is…
Exercise 17 Write a Python program to display for a given string of characters "s", the number of occurrences of each character in the string "s". Example for the string s = "Python.org" the program should display: The character: "P" appears once in the string s The character: "y" appears once in the string s…
Exercise 6 Write a Python program that returns the length of a given list without using the len() method.
Exercise 2 Write a Python algorithm to swap the first element with the last element of a given list. Example: if L = ["Python", "Java", "C++", "Javascript"], the algorithm returns the list: ["Javascript", "Java", "C++", "Python"]
Exercise 11 Write a program in Python that asks the user to enter an integer n and displays all the divisors of this number.