Question

5)

Define a function called remainder _is_even which receives two positive integer numbers as parameters: num and div. This function should return a boolean value. The value to be returned should be True if the remainder of dividing num by div is even and it should return False otherwise.

As an example, the following code fragment:

print (remainder_is_even(23,2))

should produce the output:

False

6)

Define a function first_last_repeated which receives as input parameter a string (orig) with at least one character, and a positive integer number (repet). The function should return a new string, which has the first character in the original repeated repet times followed by a space and then followed by the last character in the original string also repeated repet times.

As an example, the following code fragment:

print (first_last_repeated("abcd",4))

should produce the output:

aaaa dddd

7)

Define a function named double_add_digits_in_string(...) which receives a string as a parameter and returns the sum of the digits multiplied by two. A solution using a loop is expected.

As an example, the following code fragment:

total = double_add_digits_in_string("xx1xx2xx3xx") print (total)

should produce the output:

12

8)

This function digits_stars(...) receives as input one digit (that is, an integer number greater or equal than 0 and less or equal than 9). The function should return a string. The string will have , alternating, a digit and a "*" symbol, starting with the digit 0, then a star, then the digit 1, then a star, and so on, alternating until reaching the input digit and one star symbol to end the string.

As an example, the following code fragment:

print (digits_stars(3))

should produce the output:

0*1*2*3*

Answer 1

# 5
def remainder_is_even(num, div):
    return (num % div) % 2 == 0


# 6
def first_last_repeated(orig, repet):
    return orig[0] * repet + ' ' + orig[-1] * repet


# 7
def double_add_digits_in_string(s):
    total = 0
    for ch in s:
        if ch.isdigit():
            total += int(ch)
    return 2 * total


# 8
def digits_stars(n):
    result = ''
    for i in range(n + 1):
        result += str(i) + "*"
    return result


# Testing the functions here. ignore/remove the code below if not required
print(remainder_is_even(23, 2))
print(first_last_repeated("abcd", 4))
total = double_add_digits_in_string("xx1xx2xx3xx")
print(total)
print(digits_stars(3))