DocumentationMathematicaBuilt-in FunctionsNew in Version 3.xNumerical Computation
Further Examples: N (modified)
Here is a numerical approximation to the square root of .
Here is a numerical approximation to to decimal places.
Here is an expression composed of radicals that happens to be zero.
It is not possible to show that zz is exactly zero by using approximate arithmetic.
This shows that zz is equivalent to zero.