Removing initial whitespace plus the last empty new line line using python

I am trying to implement a code that prints an 8 by 8 matrix (0 to 63). It should however remove the initial tab spaces and the last empty line. My code is below :

s =''
for i in range(n):
    for j in range(n):
        z = i * n + j
        s += ' '
        if z < 10:
            s += ' '
        s += str(z)
    s += 'n'
print(s)

The image Below is also the desired output

I have tried the dedent function but it fails to remove the last line as well

Answer

Basically all you are looking for is whenever you go to a new line, the initial space is not printed, since every newline is a j, you will need to add:

        if j != 0:
            s += ' '

It should work. Will look like this now:

s =''
for i in range(n):
    for j in range(n):
        z = i * n + j

        if j != 0:
            s += ' '
        
        if z < 10:
            s += ' '
        s += str(z)
    
    if i != j:
        s += 'n'
print(s)

Let me know if it has any problems.