part 4 updated

Author: kattat13

part04/06_triangle.py

@@ -0,0 +1,15 @@
+def line(num, text):
+    if text:
+        print(text[0] * num)
+    else:
+        print('*' * num)
+
+def triangle(size):
+    i = 1
+    while i <= size:
+        line(i, "#")
+        i += 1
+
+# You can test your function by calling it within the following block
+if __name__ == "__main__":
+    triangle(5)

part04/07_shape.py

@@ -0,0 +1,24 @@
+def line(num, text):
+    if text:
+        print(text[0] * num)
+    else:
+        print('*' * num)
+
+
+def triangle(size, character):
+    i = 1
+    while i <= size:
+        line(i, character)
+        i += 1
+
+
+def shape(triangle_size, triangle_char, rectangle_size, rectangle_char):
+    triangle(triangle_size, triangle_char)
+    for x in range(rectangle_size):
+        line(triangle_size, rectangle_char)
+
+
+
+# You can test your function by calling it within the following block
+if __name__ == "__main__":
+    shape(5, "x", 2, "o")

part04/08_spruce.py

@@ -0,0 +1,16 @@
+# Write your solution here
+def spruce(size):
+    print('a spruce!')
+    char = '*'
+    i = 1
+    j = 1
+
+    while i <= size:
+        print(f'{" " * (size - i)}{char * (j)}')
+        i += 1
+        j += 2
+    print(f'{" " * (size - 1)}{char}')    
+
+# You can test your function by calling it within the following block
+if __name__ == "__main__":
+    spruce(5)

part04/09_greatest_number.py

@@ -0,0 +1,19 @@
+# Write your solution here
+def greatest_number(a, b, c):
+    if a >= b and a >= c:
+
+        return a
+
+    elif b >= c:
+
+        return b
+
+    else:
+
+        return c
+
+
+# You can test your function by calling it within the following block
+if __name__ == "__main__":
+    greatest = greatest_number(5, 4, 8)
+    print(greatest)

part04/10_same_characters.py

@@ -0,0 +1,16 @@
+def same_chars(text, num1, num2):
+    try:
+        char1 = text[num1]
+        char2 = text[num2]
+        if char1 == char2:
+            return True
+        else:
+            return False
+    except IndexError:
+        return False
+
+
+
+# You can test your function by calling it within the following block
+if __name__ == "__main__":
+    print(same_chars("coder", 1, 28))

part04/11_first_second_last.py

@@ -0,0 +1,26 @@
+def first_word(sentence):
+    space_index = sentence.find(' ')
+    return sentence[:space_index]
+
+
+def second_word(sentence):
+    space_index = sentence.find(' ')
+    new_sentence = sentence[space_index+1:]
+    second_space = new_sentence.find(' ')
+    if second_space == -1:
+        return new_sentence
+    return new_sentence[:second_space]
+
+
+def last_word(sentence):
+    last_space_index = sentence.rfind(' ')
+    return sentence[last_space_index+1:]
+
+
+
+# You can test your function by calling it within the following block
+if __name__ == "__main__":
+    sentence = "first second"
+    print(first_word(sentence))
+    print(second_word(sentence))
+    print(last_word(sentence))

part04/12_change_value_of_item.py

@@ -0,0 +1,13 @@
+numbers = [1, 2, 3, 4, 5]
+
+while True:
+    index = int(input("Index: "))
+
+    if index == -1:
+        break
+    if index < 0 or index >= len(numbers):
+        print("Out of range")
+        continue
+    new_value = int(input("New value: "))
+    numbers[index] = new_value
+    print(numbers)

part04/13_add_items_to_list.py

@@ -0,0 +1,8 @@
+size = int(input("How many items: "))
+numbers = []
+i = 1 
+while i <= size:
+    item = int(input(f"Item {i}:"))
+    numbers.append(item)
+    i += 1
+print(numbers)

part04/14_addition_and_removal.py

@@ -0,0 +1,17 @@
+lst = []
+
+
+while True:
+    print('The list is now', lst)
+    user = input('a(d)d, (r)emove or e(x)it: ')
+    if user == 'd':
+        if not lst:
+            lst.append(1)
+        else:            
+            lst.append(lst[-1]+1)
+    elif user == 'r':
+        last = len(lst) - 1
+        lst.pop(last)
+    else:
+        print('Bye!')
+        break

part04/15_same_word_twice.py

@@ -0,0 +1,10 @@
+words = []
+
+while True:
+    user = input('Word: ')
+    if user in words:
+        print('You typed in {} different words'.format(len(words)))
+        break
+    words.append(user)
+
+                 

part04/16_list_twice.py

@@ -0,0 +1,10 @@
+lst = []
+
+while True:
+    number = int(input("New item: "))
+    if number == 0:
+        break
+    lst.append(number)
+    print(f"The list now: {lst}")
+    print(f"The list in order: {sorted(lst)}")
+print("Bye!")

part04/17_length_of_list.py

@@ -0,0 +1,8 @@
+def length(list):
+    return len(list)
+
+# You can test your function by calling it within the following block
+if __name__ == "__main__":
+    my_list = [3, 6, -4]
+    result = length(my_list)
+    print(result)

part04/18_mean.py

@@ -0,0 +1,15 @@
+def mean(list : list):
+    i = 0
+    sum = 0
+    while i < len(list):
+        sum += list[i]
+        i += 1
+    return sum/len(list)
+
+
+
+# You can test your function by calling it within the following block
+if __name__ == "__main__":
+    my_list = [3, 6, -4]
+    result = mean(my_list)
+    print(result)

part04/19_range_of_list.py

@@ -0,0 +1,9 @@
+def range_of_list(lst : list):
+    return max(lst) - min(lst)
+
+
+# You can test your function by calling it within the following block
+if __name__ == "__main__":
+    my_list = [3, 6, -4]
+    result = range_of_list(my_list)
+    print(result)

part04/20_star_studded.py

@@ -0,0 +1,7 @@
+number = int(input("Please type in a positive integer: "))
+
+for i in range(-number, number+1):
+    if i == 0:
+        continue
+    else:
+        print(i)