# toRRi -- construct an interval

## Synopsis

• Usage:
I = toRRi(n)
I = toRRi(l,r)
I = toRRi(prec,l,r)
• Inputs:
• Outputs:
• I, ,

## Description

Returns an interval as small as possible containing n or from l to r. Note that if l is to the right of r, the constructed interval is empty. This is a more low-level function and interval or span should be used instead.