Week5 Coding Exercise 2

#2
#This program is written to return the list odd numbers among the number choices of a user

print("METHOD1: Using For-Loop")
#Function Program
def only_odds(expected_list):
    answer=[]
    for num in expected_list:
        if (num%2) != 0:
            answer.append(num)
    return(answer)

#Main Program
user_list=[]
while True:
    try:
        n=int(input("How many numbers would you like to play with? "))
        break
    except ValueError:
        print("That's a wrong input!\nYou must provide a positive integer. Please, try again.")
        print("\n")

for i in range(n):
    while True:
        try:
            user_num=int(input("Enter those numbers of your choice: "))
            break
        except ValueError:
            print("That's a wrong input!\nYou must provide a positive integer. Please, try again.")
            print("\n")
    user_list.append(user_num)

print("The odd numbers in", user_list,"are: ",only_odds(user_list))

print("\n")



print("METHOD 2: Using Filter Function")
#Function Program
def only_odds(expected_list):
    return expected_list%2 !=0

#Main Program
user_list=[]
while True:
    try:
        n=int(input("How many numbers do u wish to play with: "))
        break
    except ValueError:
        print("That's a wrong input!\nYou must provide a positive integer. Please, try again.")
        print("\n")

for i in range(n):
    while True:
        try:
            user_num=int(input("Enter those numbers of your choice: "))
            break
        except ValueError:
            print("That's a wrong input!\nYou must provide a positive integer. Please, try again.")
        print("\n")
    user_list.append(user_num)

print("The odd numbers in", user_list,"are: ")
print(list(filter(only_odds, user_list)))

print("\n")

print("METHOD 3: Using Lambda Function")

user_list=[]
while True:
    try:
        n=int(input("How many numbers do u wish to play with: "))
        break
    except ValueError:
        print("That's a wrong input!\nYou must provide a positive integer. Please, try again.")
        print("\n")

for i in range(n):
    while True:
        try:
            user_num=int(input("Enter those numbers of your choice: "))
            break
        except ValueError:
            print("That's a wrong input!\nYou must provide a positive integer. Please, try again.")
    user_list.append(user_num)

print("The odd numbers in", user_list,"are: ")
print(list(filter(lambda user_no: (user_no%2) != 0,user_list)))