Numerical

Numerical[ expr (, n) ] returns the approximate numerical value of an expression, with optional parameter n, the number of decimals.

Usages

Numerical[expr] returns the approximate numerical value of an expression expr.

Example	in	out
The approximate value of `pi`.	`Numerical[ pi ]`	`3.1415926536`
The numerical value of `3^2 + 9` using numerical approximation.	`Numerical[ 3^2 + 9]`	`18`
The approximate value of `x`, where `x` is defined as `sin(1)` in the script.	`Numerical[x]`	`0.8414709848`

Numerical[expr, n] returns the approximate numerical value of an expression expr rounded to n decimals.

Example	in	out
The approximate value of `x`, where `x` is defined as `sin(1)` in the script, rounded to 3 decimals.	`Numerical[x, 3]`	`0.841`