How to exclude characters when counting digits

[volcano63]

Since you were given a lot of advice, just some details about this code

def countDigits(s) :
    digits = 0
    x = len(s)

    for i in range(0, x, 1) :
        ((ord(s[i]) >= 65) and (ord(s[i]) <= 57)) <----- This line does nothing
        digits += 1
        if s.isdigit() == False :
            digits -= 1
            break
        else:   <--- This is parasitic
            continue 
    return digits


s = input("Enter a string\n")

print("There are", countDigits(s), "digits in your string.")