Sqrt¶

Returns the square root of a number.

$ wo 'Sqrt[16]'
4

$ wo 'Sqrt[0]'
0

A square factor comes out of the radical even when it is far too large to find by trial division — 1150069001035 is 100003^2 * 115:

$ wo 'Sqrt[1150069001035]'
100003*Sqrt[115]

$ wo 'Sqrt[1150069001035]/2'
(100003*Sqrt[115])/2

A radicand with no repeated prime factor stays whole — 15485599740329 is 999983 * 15485863:

$ wo 'Sqrt[15485599740329]'
Sqrt[15485599740329]

\[Sqrt] is a prefix operator binding to the next factor, with ^, ! and [[…]] binding tighter than the radical:

$ wo '\[Sqrt]x y'
Sqrt[x]*y

$ wo '\[Sqrt]x^2'
Sqrt[x^2]

$ wo '\[Sqrt]2 3'
3*Sqrt[2]