Help me debug this.

#This program should display every combination of three digits. ie $000$ to $999.$ starts off with $000$ then $001002$ etc..

#goes all the way to $999$

#If the values go outside of those ranges, then the program is wrong

digit$1=0$

digit$2=0$

digit$3=0$

while$($digit$1<=9)$:

while$($digit$2<=9)$:

while$($digit$3<=9)$:

print$($digit$1,$digit$2,$digit$3)$

digit$1=$ digit$1+1$

digit$2=$ digit$2+1$

digit$3=$ digit$3+1$