16_lists_functions_exercises.py

# Write a function that adds the elements of a list:
def add_elements(list1):
    pass # remove this line once you've written the function

# Test your function with the following:
print(add_elements([1, 2, 3])) # Should print 6
print(add_elements([4, 5, 6])) # Should print 15
print(add_elements([7, 8, 9, 10, 11])) # Should print 45
print(add_elements([])) # Should print 0

# Write a function that only adds the ODD INDEXED elements of a list:
def add_odd_indexed_elements(list1):
    pass # remove this line once you've written the function

# Test your function with the following:
print(add_odd_indexed_elements([1, 2, 3])) # Should print 2
print(add_odd_indexed_elements([4, 5, 6])) # Should print 5
print(add_odd_indexed_elements([7, 8, 9, 10, 11])) # Should print 18
print(add_odd_indexed_elements([])) # Should print 0
print(add_odd_indexed_elements([1])) # Should print 0
print(add_odd_indexed_elements([1, 2])) # Should print 2


# Write a function that returns only the odd indexed elements of a list (in a new list):
def odd_indexed_elements(list1):
    pass # remove this line once you've written

# Test your function with the following:
print(odd_indexed_elements([1, 2, 3])) # Should print [2]
print(odd_indexed_elements([4, 5, 6])) # Should print [5]
print(odd_indexed_elements([7, 8, 9, 10, 11])) # Should print [8, 10]
print(odd_indexed_elements([])) # Should print []
print(odd_indexed_elements([1])) # Should print []
print(odd_indexed_elements([1, 2])) # Should print [2]

# Write a function that prints the 3rd character of a string. 
def print_third_char(string1):
    pass # remove this line once you've written the function

# Test your function with the following:
print_third_char("Hello!") 
print_third_char("Goodbye!") 
print_third_char("How are you?") 
print_third_char("I'm a function!") 

# Write a function that changes the 5th character of a string to an exclamation point.
# If the string is less than 5 characters long, print "String too short."
def change_fifth_char(string1):
    pass # remove this line once you've written the function

# Test your function with the following:
change_fifth_char("Hellooo")
change_fifth_char("Goodbye")
change_fifth_char("How are you")
change_fifth_char("I'm a function")
change_fifth_char("Hi")
change_fifth_char("Bye")