Question

I am using Python 3.5.2

2. Create a function called is_interesting that, given a string, returns the Boolean value True if the number of vowels (a e i o u) in the string is a prime number (assume that the strings are always passed as lower-case letters to simplify). The function header should be as follows: def is_interesting(a_string) For example is_interesting(“yien”) returns True, is_interesting(“wang”) returns False

Answer 1

def is_interesting(a_string):
count = 0
for i in range(0, len(a_string)):
ch = a_string[i]
if ch == 'a' or ch =='i' or ch == 'e' or ch == 'o' or ch == 'u':
count = count + 1
if isPrime(count):
return True;
else:
return False;
  
def isPrime(n):
if n < 2:
return False;
for i in range(2, n/2):
if n % i == 0:
return False;
return True;
     
  
  
print is_interesting("yien");
print is_interesting("wang");
print is_interesting("Suresh");

Output:

sh-4.3$ python main.py                                                                                                                                                                                                                                 

True                                                                                                                                                                                                                                                   

False                                                                                                                                                                                                                                                  

True