feat: completed exercise 17 and 18

lab-05/exercise-18.py

@@ -2,4 +2,21 @@
 The Collatz conjecture states that if you start with any positive integer n, and if n is even, divide it by 2; if n is
 odd, multiply it by 3 and add 1. Repeat the process. The sequence will always eventually reach 1. Write a program to
 print this sequence for a given number.
-"""
+"""
+
+# set variable n to 6
+n = 6
+
+# Runs the loop until n = 1, signifying the end of the Collatz conjecture
+while n != 1:
+    # print value of n plus a comma and space to print on the same line
+    print(n, end=", ")
+    # if n is even, halve n
+    if n % 2 == 0:
+        n = n // 2
+    # if n is odd, multiply by 3 and add one    
+    else:
+        n = n * 3 + 1
+
+# Prints final value for n, which should always be 1        
+print(n)