Compare the simlarity of two strings in Python

Again, I have adapted this code from some C code I found on the Internet years ago.

Side note: Did you know that toward and towards are completely interchangeable? Toward tends to get used in American English while towards is used more heavily in British English.

def wordcompare (s1, s2, weight_toward_front = False):
    """Compares two strings and returns a value between 0 and 100 for similarness"""

    if not s1 or not s2:
        return 0

    if s1 == s2:
        return 100

    s1_len = len(s1)
    s2_len = len(s2)

    n = i = j = k = x = y = 0

    while i < s1_len:
        x = i
        j = 0
        while j < s2_len:
            y = j
            k = 0
            while x < s1_len and y < s2_len and s1[x] == s2[y]:
                eb = 1
                if weight_toward_front:
                    if (x < 1 and y < 1):
                        eb += 3
                    if (x < 2 and y < 2):
                        eb += 2
                    if (x < 3 and y < 3):
                        eb += 1

                k += 1
                n += (k*k*eb)
                x += 1
                y += 1

            j += 1
        i += 1
    
    n = int((n * 20) / (s1_len * s2_len))

    if n > 100:
        n = 100

    return n

Compare the simlarity of two strings in Visual Basic

I have adapted this code from some C code I found on the Internet years ago.

Function WordCompare(word1 As String, word2 As String, Optional weight_towards_front As Boolean = False) As Integer
    'Compares two strings and returns a value between 0 and 100 for similarness
    If word1 = "" And word2 = "" Then
        WordCompare = 0
        Exit Function
    End If
    
    If word1 = word2 Then
        WordCompare = 100
        Exit Function
    End If
    
    Dim word1_len, word2_len As Integer
    
    word1_len = Len(word1)
    word2_len = Len(word2)
    
    Dim n, i, j, k, x, y, eb As Integer
    n = 0
    i = 0
    j = 0
    k = 0
    x = 0
    y = 0
    
    For i = 1 To word1_len
        x = i
        
        For j = 1 To word2_len
            y = j
            k = 0
            
            Do While x <= word1_len And y <= word2_len And Mid(word1, x, 1) = Mid(word2, y, 1)
                eb = 1
                If weight_towards_front Then
                    If x < 2 And y < 2 Then
                        eb = eb + 3
                    End If
                    If x < 3 And y < 3 Then
                        eb = eb + 2
                    End If
                    If x < 4 And y < 4 Then
                        eb = eb + 1
                    End If
                End If
                
                k = k + 1
                n = n + (k * k * eb)
                x = x + 1
                y = y + 1
            Loop
            
        Next j
    Next i
    
    n = (n * 20) / (word1_len * word2_len)
    
    If n > 100 Then
        n = 100
    End If
    
    WordCompare = n
    
End Function