Week 3.py

def RemoveVowels(string):
    """ enter a string in lower case and this function will remove the vowels"""
    
    if 'a' in string:
        newString = string.replace('a','') #removes the vowel from the string
        
        return(RemoveVowels(newString)) #calls function again until the sting has no more vowels

    elif 'e' in string:
        newString =  string.replace('e','')
        
        return(RemoveVowels(newString))

    elif 'i' in string:
        newString =  string.replace('i','')
        
        return(RemoveVowels(newString))
        

    elif 'o' in string:
        newString =  string.replace('o','')
        
        return(RemoveVowels(newString))

    elif 'u'in string:
        newString =  string.replace('u','')
        
        return(RemoveVowels(newString))

    else:
        return('Your word without vowels >> ' + str(string))


print(RemoveVowels('beautiful'))

#Week 3 task 1    
def ReverseAString(sentence):
    listOfWords = sentence.split(" ") #splitting sentence at spaces
    n = len(listOfWords) - 1 #index of last element in list
    reversedList = []
    for i in range(len(listOfWords)):
        #appending the words in the sentence in reverse order
        word = listOfWords[n] 
        reversedList.append(word)
        n = n - 1

    return(" ".join(reversedList))

    
print(ReverseAString("This Is Awesome"))   
    
#BigO O(n)    

def PrimeNumber(n,x):
  """n is the number you want to test and x = n-1"""
  
  if n <= 1:
    return("Your Number isn't Prime")
  elif n = 2:
    return("Your number is Prime")
  elif x = 1:
    return("Your number is Prime")
  elif n%x = 0:
    return("Your Number isn't Prime")
  elif n%x != 0:
    return(PrimeNumber(n,x-1))
  


print(PrimeNumber(17,16))
print(PrimeNumber(4,3))
print(PrimeNumber(1,0))


#Week 3 Task 1 Pseudocode
#reversiving a string function

ReverseAString(sentence):
	
	listOfWords <- split sentence at spaces

	n <- length(listOfWords) - 1

	reversedList <- []

	FOR i <- 0 to length[listOfWords]
	
		
		word <- listOfWords[n]

		reversedList.append(word)
		
		n <- n - 1

	RETURN(reversedList)
Big O notation for this function O(n)

#week 3 task 2
Checking if a number is prime
PrimeNumber(n,x):
  
	IF n <= 1:
		return("Your Number isn't Prime")
	ELSE IF n = 2:
		return("Your number is Prime")
	ELSE IF x = 1:
		return("Your number is Prime")
	ELSE IF n%x = 0:
		return("Your Number isn't Prime")
	ELSE IF n%x != 0:
		return(PrimeNumber(n,x-1))
  
#week 3 task 3
Removing vowels function

RemoveVowels(string)

	IF a in string

		newString <- replace 'a' in string with ''

		RETURN(RemoveVowels(newString))

	ELSE IF e in string

		newString <- replace 'e' in string with ''

		RETURN(RemoveVowels(newString)

	ELSE IF i in string

		newString <- replace 'i' in string with ''

		RETURN(RemoveVowels(newString)

	ELSE IF o in string

		newString <- replace 'o' in string with ''

		RETURN(RemoveVowels(newString)

	ELSE IF u in string

		newString <- replace 'u' in string with ''

		RETURN(RemoveVowels(newString)

	ELSE
		RETURN(string)


#week 3 task 3 Pseudocode

#Removing vowels function

RemoveVowels(string)

	IF a in string

		newString <- replace 'a' in string with ''

		RETURN(RemoveVowels(newString))

	ELIF e in string

		newString <- replace 'e' in string with ''

		RETURN(RemoveVowels(newString)

	ELIF i in string

		newString <- replace 'i' in string with ''

		RETURN(RemoveVowels(newString)

	ELIF o in string

		newString <- replace 'o' in string with ''

		RETURN(RemoveVowels(newString)

	ELIF u in string

		newString <- replace 'u' in string with ''

		RETURN(RemoveVowels(newString)

	ELSE
		RETURN(string)