FileHash["file"] gives an integer hash code for the contents of the specified file.FileHash["file", " type"] gives an integer hash of the specified type.
For
(Built-in Mathematica Symbol) For[start, test, incr, body] executes start, then repeatedly evaluates body and incr until test fails to give True.
NRoots
(Built-in Mathematica Symbol) NRoots[lhs == rhs, var] yields a disjunction of equations which represent numerical approximations to the roots of a polynomial equation.
Overscript[x, y] is an object that formats as OverscriptBox[x, y].
Right
(Built-in Mathematica Symbol) Right is a symbol that represents the right-hand side for purposes of alignment and positioning.
SelectionCreateCell[notebook] copies the contents of the current selection in a notebook into a new cell. SelectionCreateCell[notebook, sel] sets the current selection after ...
$MachinePrecision gives the number of decimal digits of precision used for machine-precision numbers.
$MinPrecision gives the minimum number of digits of precision to be allowed in arbitrary-precision numbers.
An Euler equation has the general form Euler equations can be solved by transforming them to equations with constant coefficients. This is an example of an Euler equation.
The following sequence shows how to change the aspect ratio of a plot. Using the Selection tool, click to select the graphic. Shift+drag a handle to change the aspect ratio.