Sqrt

Sqrt[e] finds the square root of e.

Attributes[Sqrt] := {Listable, NumericFunction, Protected}

Simple examples

In[1]:= Sqrt[3]
Out[1]= Sqrt[3]

In[2]:= Sqrt[-1]
Out[2]= I

In[3]:= Sqrt[-3]
Out[3]= I*Sqrt[3]

In[4]:= Sqrt[1]
Out[4]= 1

In[5]:= Sqrt[0]
Out[5]= 0