Add 1 exercise in ch4

Shehab Abdel-Salam · Shehab Abdel-Salam · commit 65334eb5f1a3 · 2024-08-19T00:35:26.000+01:00
diff --git a/chapters/chapter04_control_flow/exercises/exercise_ch4_03.py b/chapters/chapter04_control_flow/exercises/exercise_ch4_03.py
@@ -1,11 +1,18 @@
-# Exercise 04_03 - Check Number
-# Write a program that returns:
-# - 'Positive' if the number is greater than 0
-# - 'Negative' if the number is less than 0
-# - 'Zero' if the number is equal to 0
+# Exercise 04_03 - Alice and Mark
+# Alice has scored X marks in her test and Bob has scored Y marks in the same test.
+# Alice is happy if she scored at least twice the marks of Bob’s score.
 
+# Write a program that checks if Alice is happy or not.
+# Example 1:
+# Input: 10, 5
+# Output: True
 
-def check_number(number):
+# Example 2:
+# Input: 5, 10
+# Output: False
+
+
+def is_alice_happy(alice_marks, bob_marks):
     # Your code should go here.
 
     return ...
diff --git a/chapters/chapter04_control_flow/exercises/exercise_ch4_04.py b/chapters/chapter04_control_flow/exercises/exercise_ch4_04.py
@@ -1,9 +1,11 @@
-# Exercise 04_04 - Even or Odd Number
-# Write a program that takes an integer and returns whether its an even or odd number.
-# Bonus: can you solve this in a single line of code? (Hint: Search for ternary operator)
+# Exercise 04_03 - Check Number
+# Write a program that returns:
+# - 'Positive' if the number is greater than 0
+# - 'Negative' if the number is less than 0
+# - 'Zero' if the number is equal to 0
 
 
-def is_even(number):
+def check_number(number):
     # Your code should go here.
 
     return ...
diff --git a/chapters/chapter04_control_flow/exercises/exercise_ch4_05.py b/chapters/chapter04_control_flow/exercises/exercise_ch4_05.py
@@ -1,13 +1,9 @@
-# Exercise 04_05 - Grade Result
-# Write a program that take an integer between 0 and 100
-# and returns the grade result based on the following rules:
-# 1. “A” if grade is between 90 and 100
-# 2. “B” if grade is between 80 and 89
-# 3. “C” if grade is between 70 and 79
-# 4. “Not Pass” if grade is less than 70
+# Exercise 04_04 - Even or Odd Number
+# Write a program that takes an integer and returns whether its an even or odd number.
+# Bonus: can you solve this in a single line of code? (Hint: Search for ternary operator)
 
 
-def grade_result(grade):
+def is_even(number):
     # Your code should go here.
 
     return ...
diff --git a/chapters/chapter04_control_flow/exercises/exercise_ch4_06.py b/chapters/chapter04_control_flow/exercises/exercise_ch4_06.py
@@ -1,11 +1,13 @@
-# Exercise 04_06 - Sum Numbers
-# Write a program that sums the numbers from start to end.
-# For example, if the start is 1 and the end is 5, the sum is 15 (1 + 2 + 3 + 4 + 5).
+# Exercise 04_05 - Grade Result
+# Write a program that take an integer between 0 and 100
+# and returns the grade result based on the following rules:
+# 1. “A” if grade is between 90 and 100
+# 2. “B” if grade is between 80 and 89
+# 3. “C” if grade is between 70 and 79
+# 4. “Not Pass” if grade is less than 70
 
-# Can you solve this once using a for loop and once using a while loop?
 
-
-def sum_numbers(start, end):
+def grade_result(grade):
     # Your code should go here.
 
     return ...
diff --git a/chapters/chapter04_control_flow/exercises/exercise_ch4_07.py b/chapters/chapter04_control_flow/exercises/exercise_ch4_07.py
@@ -1,11 +1,11 @@
-# Exercise 04_07 - Sum Even Numbers
-# Write a program that sums the even numbers from start to end.
-# For example, if the start is 1 and the end is 5, the sum is 6 (2 + 4).
+# Exercise 04_06 - Sum Numbers
+# Write a program that sums the numbers from start to end.
+# For example, if the start is 1 and the end is 5, the sum is 15 (1 + 2 + 3 + 4 + 5).
 
 # Can you solve this once using a for loop and once using a while loop?
 
 
-def sum_even_numbers(start, end):
+def sum_numbers(start, end):
     # Your code should go here.
 
     return ...
diff --git a/chapters/chapter04_control_flow/exercises/exercise_ch4_08.py b/chapters/chapter04_control_flow/exercises/exercise_ch4_08.py
@@ -1,9 +1,11 @@
-# Exercise 04_08 - Largest Index
-# Write a program that returns the index of the largest element in the list.
-# For example, given the list [1, 2, 3, 4, 5], the function should return 4.
+# Exercise 04_07 - Sum Even Numbers
+# Write a program that sums the even numbers from start to end.
+# For example, if the start is 1 and the end is 5, the sum is 6 (2 + 4).
 
+# Can you solve this once using a for loop and once using a while loop?
 
-def largest_index(elements):
+
+def sum_even_numbers(start, end):
     # Your code should go here.
 
     return ...
diff --git a/chapters/chapter04_control_flow/exercises/exercise_ch4_09.py b/chapters/chapter04_control_flow/exercises/exercise_ch4_09.py
@@ -1,9 +1,9 @@
-# Exercise 04_09 - Calculate Total Length
-# Write a program that calculates the total length of all words in a list.
-# For example, given the list ['hello', 'world'], the total length is 10.
+# Exercise 04_08 - Largest Index
+# Write a program that returns the index of the largest element in the list.
+# For example, given the list [1, 2, 3, 4, 5], the function should return 4.
 
 
-def calculate_total_length(words):
+def largest_index(elements):
     # Your code should go here.
 
     return ...
diff --git a/chapters/chapter04_control_flow/exercises/exercise_ch4_10.py b/chapters/chapter04_control_flow/exercises/exercise_ch4_10.py
@@ -1,9 +1,9 @@
-# Exercise 04_10 - Double Elements
-# Write a program that doubles each element in a list of numbers.
-# For example, given the list [1, 2, 3, 4, 5], the function should return [2, 4, 6, 8, 10].
+# Exercise 04_09 - Calculate Total Length
+# Write a program that calculates the total length of all words in a list.
+# For example, given the list ['hello', 'world'], the total length is 10.
 
 
-def double_elements(numbers):
+def calculate_total_length(words):
     # Your code should go here.
 
     return ...
diff --git a/chapters/chapter04_control_flow/exercises/exercise_ch4_11.py b/chapters/chapter04_control_flow/exercises/exercise_ch4_11.py
@@ -1,11 +1,9 @@
-# Exercise 04_11 - Find the First Divisible by 5
-# Write a program that finds the first number in a list that is divisible by 5.
-# If a number is found, return it and exit the loop. If no number is found, return None.
-# For example, given [12, 5, 20, 25], the function should return 5.
-# or given [1, 2, 3, 4, 6], the function should return None.
+# Exercise 04_10 - Double Elements
+# Write a program that doubles each element in a list of numbers.
+# For example, given the list [1, 2, 3, 4, 5], the function should return [2, 4, 6, 8, 10].
 
 
-def find_first_divisible_by_5(numbers):
+def double_elements(numbers):
     # Your code should go here.
 
     return ...
diff --git a/chapters/chapter04_control_flow/exercises/exercise_ch4_12.py b/chapters/chapter04_control_flow/exercises/exercise_ch4_12.py
@@ -1,9 +1,11 @@
-# Exercise 04_12 - Skipping Negative Numbers
-# Write a program that sums all positive numbers in a list, skipping any negative numbers.
-# For example, if the list is [1, -2, 3, -4, 5], the sum is 9 (1 + 3 + 5).
+# Exercise 04_11 - Find the First Divisible by 5
+# Write a program that finds the first number in a list that is divisible by 5.
+# If a number is found, return it and exit the loop. If no number is found, return None.
+# For example, given [12, 5, 20, 25], the function should return 5.
+# or given [1, 2, 3, 4, 6], the function should return None.
 
 
-def sum_positive_numbers(numbers):
+def find_first_divisible_by_5(numbers):
     # Your code should go here.
 
     return ...
diff --git a/chapters/chapter04_control_flow/exercises/exercise_ch4_13.py b/chapters/chapter04_control_flow/exercises/exercise_ch4_13.py
@@ -1,9 +1,9 @@
-# Exercise 04_13 - Reverse Digits
-# Write a program that takes an integer as input and returns the integer with its digits reversed.
-# For example, given the integer 123, the function should return 321.
+# Exercise 04_12 - Skipping Negative Numbers
+# Write a program that sums all positive numbers in a list, skipping any negative numbers.
+# For example, if the list is [1, -2, 3, -4, 5], the sum is 9 (1 + 3 + 5).
 
 
-def reverse_digits(n):
+def sum_positive_numbers(numbers):
     # Your code should go here.
 
     return ...
diff --git a/chapters/chapter04_control_flow/exercises/exercise_ch4_14.py b/chapters/chapter04_control_flow/exercises/exercise_ch4_14.py
@@ -0,0 +1,9 @@
+# Exercise 04_13 - Reverse Digits
+# Write a program that takes an integer as input and returns the integer with its digits reversed.
+# For example, given the integer 123, the function should return 321.
+
+
+def reverse_digits(n):
+    # Your code should go here.
+
+    return ...
diff --git a/chapters/chapter04_control_flow/tests/test_ch04.py b/chapters/chapter04_control_flow/tests/test_ch04.py
@@ -1,16 +1,17 @@
 from ..exercises.exercise_ch4_01 import fizzbuzz
 from ..exercises.exercise_ch4_02 import is_prime
-from ..exercises.exercise_ch4_03 import check_number
-from ..exercises.exercise_ch4_04 import is_even
-from ..exercises.exercise_ch4_05 import grade_result
-from ..exercises.exercise_ch4_06 import sum_numbers
-from ..exercises.exercise_ch4_07 import sum_even_numbers
-from ..exercises.exercise_ch4_08 import largest_index
-from ..exercises.exercise_ch4_09 import calculate_total_length
-from ..exercises.exercise_ch4_10 import double_elements
-from ..exercises.exercise_ch4_11 import find_first_divisible_by_5
-from ..exercises.exercise_ch4_12 import sum_positive_numbers
-from ..exercises.exercise_ch4_13 import reverse_digits
+from ..exercises.exercise_ch4_03 import is_alice_happy
+from ..exercises.exercise_ch4_04 import check_number
+from ..exercises.exercise_ch4_05 import is_even
+from ..exercises.exercise_ch4_06 import grade_result
+from ..exercises.exercise_ch4_07 import sum_numbers
+from ..exercises.exercise_ch4_08 import sum_even_numbers
+from ..exercises.exercise_ch4_09 import largest_index
+from ..exercises.exercise_ch4_10 import calculate_total_length
+from ..exercises.exercise_ch4_11 import double_elements
+from ..exercises.exercise_ch4_12 import find_first_divisible_by_5
+from ..exercises.exercise_ch4_13 import sum_positive_numbers
+from ..exercises.exercise_ch4_14 import reverse_digits
 
 
 def test_ch04_e01():
@@ -29,71 +30,79 @@ def test_ch04_e02():
 
 
 def test_ch04_e03():
+    assert is_alice_happy(10, 5) is True
+    assert is_alice_happy(5, 10) is False
+    assert is_alice_happy(10, 10) is False
+    assert is_alice_happy(20, 10) is True
+    assert is_alice_happy(10, 20) is False
+
+
+def test_ch04_e04():
     assert check_number(0) == "Zero"
     assert check_number(5) == "Positive"
     assert check_number(-5) == "Negative"
 
 
-def test_ch04_e04():
+def test_ch04_e05():
     assert is_even(2) is True
     assert is_even(3) is False
     assert is_even(4) is True
     assert is_even(5) is False
 
 
-def test_ch04_e05():
+def test_ch04_e06():
     assert grade_result(90) == "A"
     assert grade_result(80) == "B"
     assert grade_result(70) == "C"
     assert grade_result(60) == "Not Pass"
     assert grade_result(50) == "Not Pass"
 
 
-def test_ch04_e06():
+def test_ch04_e07():
     assert sum_numbers(0, 2) == 1
     assert sum_numbers(1, 10) == 45
     assert sum_numbers(1, 100) == 4950
 
 
-def test_ch04_e07():
+def test_ch04_e08():
     assert sum_even_numbers(0, 2) == 0
     assert sum_even_numbers(1, 10) == 20
     assert sum_even_numbers(1, 100) == 2450
 
 
-def test_ch04_e08():
+def test_ch04_e09():
     assert largest_index([1, 2, 3, 4, 5]) == 4
     assert largest_index([5, 4, 3, 2, 1]) == 0
     assert largest_index([1, 2, 5, 4, 3]) == 2
     assert largest_index([1, 2, 3, 5, 4]) == 3
 
 
-def test_ch04_e09():
+def test_ch04_e10():
     assert calculate_total_length(["Hello", "World"]) == 10
     assert calculate_total_length(["Python", "Programming"]) == 17
     assert calculate_total_length(["Python", "Programming", "Language"]) == 25
 
 
-def test_ch04_e10():
+def test_ch04_e11():
     assert double_elements([1, 2, 3]) == [2, 4, 6]
     assert double_elements([4, 5, 6]) == [8, 10, 12]
     assert double_elements([7, 8, 9]) == [14, 16, 18]
 
 
-def test_ch04_e11():
+def test_ch04_e12():
     assert find_first_divisible_by_5([1, 2, 3, 4, 5]) == 5
     assert find_first_divisible_by_5([5, 10, 15, 20, 25]) == 5
     assert find_first_divisible_by_5([6, 7, 8, 9, 10]) == 10
     assert find_first_divisible_by_5([11, 13, 16]) is None
 
 
-def test_ch04_e12():
+def test_ch04_e13():
     assert sum_positive_numbers([]) == 0
     assert sum_positive_numbers([1, 2, 3, 4, 5]) == 15
     assert sum_positive_numbers([1, -2, 3, -4, 5]) == 9
 
 
-def test_ch04_e13():
+def test_ch04_e14():
     assert reverse_digits(123) == 321
     assert reverse_digits(456) == 654
     assert reverse_digits(789) == 987
