Python | Passing string value to the function

Program:

# Python program to pass a string to the function

# function definition: it will accept 
# a string parameter and print it 
def printMsg(str):
	# printing the parameter 
	print str

# Main code 
# function calls 
printMsg("Hello world!")
printMsg("Hi! I am good.")

Output

Hello world!
Hi! I am good.

Write function that will accept a string and return total number of vowels

# function definition: it will accept 
# a string parameter and return number of vowels 
def countVowels(str):
	count = 0
	for ch in str:
		if ch in "aeiouAEIOU":
			count +=1 
	return count 

# Main code 
# function calls 
str = "Hello world!"
print "No. of vowels are {0} in "{1}"".format(countVowels(str),str)

str = "Hi, I am good."
print "No. of vowels are {0} in "{1}"".format(countVowels(str),str)

Output

No. of vowels are 3 in "Hello world!"
No. of vowels are 5 in "Hi, I am good."