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Python Course Materials/Week6/main.py

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+# sumnN(n) returns the sum of the first n natural numbers.
+# sumNCubes(n) returns the sum of the cubes of the first n natural numbers.
+
+# Then use these functions in a program that prompts a user for an n and prints out the sum of the first n natural numbers and the sub of the cubes of the first n natural numbers.
+
+# What the heck is a natural number?
+# number that is positive and whole
+
+# Prompt function
+def prompt():
+    promptresponse = int(input("Please enter a number for n:"))
+    return promptresponse
+
+def sumN(n):
+    sum = 0 #initialize sum for use
+    print("Let's show the work for the sum of the natural numbers:\n")
+    for i in range(1,n+1): # start building the natural numbers leading up to n.
+        sum += i
+        if sum != n+1:
+            string_concatenate = f"{i} + " # concatenate the string to show the user the sum
+        else:
+            string_concatenate = f"{i}"
+        print(string_concatenate, end="") # print the string
+    print(f" = {sum}") # print the sum
+    return sum # return the sum to the function
+    
+def sumNCubes(n):
+    sum = 0 #initialize sum for use
+    for i in range(1,n+1): # start building the natural numbers leading up to n.
+        sum += i**3 # add the cube of the number to the sum
+        if sum!=n+1:
+            string_concatenate = f"{i}^3 + "
+        else:
+            string_concatenate = f"{i}^3"
+        print(string_concatenate, end="") # print the string
+    return sum # return the sum to the function
+    
+# Main Function
+def main():
+    # Prompt the user for n.
+    n=prompt()
+    print(f"The sum for sumN of the 'natural numbers is': {sumN(n)}")
+    
+    print(f"The sum for sumN of the 'natural numbers is': {sumNCubes(n)}")
+
+    # Ask the user to see if they want to continue
+    continueprompt = input("Would you like to continue? (y/n)")
+    if continueprompt == "y":
+        main()
+    else:
+        print("Goodbye!")
+if __name__ == "__main__":
+    main()