Missing character on keyboard

[Neil Winchurst]

I was looking at the man page for dc, which is a RPN calculator. Most of 
it is fine, since I am used to using the forth language. However, I have 
noticed that the character which I need for calculating the square root 
of a number is missing from my English UK keyboard.

The character for finding the power of a number is ^ which on my 
keyboard is on the key for the number 6. On the man page the character 
for square root is like an upside down version of the ^ symbol. That is 
not on my keyboard. Research has not helped. And yes, I do know about 
and use the compose key, in my case AltGr.

If anyone can point me in the right direction I would be very grateful,

thanks

Neil