Sqrt ()

• Mathematical function, suitable for both symbolic and numerical manipulation.

• can be entered using Ctrl+2 z or \(\@z\).

• Sqrt[z] is converted to .

• Sqrt[z^2] is not automatically converted to z.

• Sqrt[a b] is not automatically converted to Sqrt[a]Sqrt[b].

• These conversions can be done using PowerExpand, but will typically be correct only for positive real arguments.

• For certain special arguments, Sqrt automatically evaluates to exact values.

• Sqrt can be evaluated to arbitrary numerical precision.

• Sqrt automatically threads over lists.

• In StandardForm, Sqrt[z] is printed as .

• z can also be used for input. The character is entered as Esc sqrt Esc or \[Sqrt].