Solution Exercise 71: python algorithm which find the minimum digits in given string

Exercise 71 **

Write a Python program which determines the minimum digit within a given string s. Example if s = "Python3.7 is more power than Python2.7" , the algorithm must returns 2. We assume that the string s does not contain any negative number.

Solution

def minimumDigit(s):
    # creating and initializing the list of digits 
    listDigits = []
    for x in s:
        if x.isdigit():
            x = int(x)
            listDigits.append(x)
    
    # initializing the minimum of digits
    minDigit = listDigits[0]
    
    # iterate over all list elements
    for n in listDigits:
        if minDigit > n:
            minDigit = n
    return minDigit
# Example:
s = "Python3.7 is more power than Python2.7"
print("The minimum  digit within s is : ", minimumDigit(s))
# The output is : The minimum  digit within s is :  2