# datatable.FExpr.__neg__()¶

Unary minus, which corresponds to python operation -x.

If x is a multi-column expressions, then the - operator will be applied to each column in turn.

Unary minus can only be applied to numeric columns. The resulting column will have the same stype as its argument, but not less than int32.

## Parameters¶

x
FExpr

Either an FExpr, or any object that can be converted into FExpr.

return
FExpr

An expression that evaluates -x.