Lesson 13 STR Slice

1.

STR Slicing

2.

Naming Conventions
Use the Task Name
Generate a Masked Credit Card Number
Name file: Generate_a_Masked_Credit_Card_Number

3.

Generate_a_Masked_Credit_Card_Number
Write a program that takes a credit card number as input (a string of 16 digits) and returns a masked version where only the last four
digits are visible. The rest should be replaced with *. If the input is not 16 digits, print "Invalid card number".
INPUT: 1234567812345678
OUTPUT: ************5678

4.

Find Words That Contain a Specific Letter in a List
Write a program that takes a list of words and a letter. Find all words that contain the letter at least twice and store them in a new list. If
no words match the criteria, print "No words found".
words = ["banana", "apple", "cherry", "grape"]
letter = "a"
OUTPUT: ['banana', 'apple']

5.

Find the Longest Word in a List
Write a program that takes a list of words and finds the longest one using string
slicing and if conditions. If two words have the same length, return the first one
that appears in the list.
words = ["apple", "banana", "cherry", "blueberry"]
OUTPUT: The longest word is blueberry.

6.

Capitalize Every Alternate Word in a Sentence
Write a Python program that takes a sentence and capitalizes every alternate word, starting from the first. If the sentence has less than
two words, print "Too short to modify".
INPUT:
sentence = "python is a great programming language"
OUTPUT: "Python is A great Programming language"

7.

Removing Duplicates from a List
Write a Python program that removes duplicate values from a list while
maintaining the original order.
Example Input: [1, 2, 2, 3, 4, 4, 5]
OUTPUT: [1, 2, 3, 4, 5]