ESC-B(1)                    General Commands Manual                   ESC-B(1)

NNAAMMEE
     eesscc--BB - the roff escape B sequence: validate numerical expression

DDEESSCCRRIIPPTTIIOONN
     empty: 0
     digit: 1
     no number: 0
     trailing garbage: 0
     trailing operator: 0
     infix operator: 1
     infix and trailing operator: 0
     chain of operations: 1
     trailing para: 0
     unclosed para: 0
     empty pair of parentheses: 0
     parentheses containing number: 1
     complex expression: 1
     other delimiter: 1

   AArrgguummeenntt ddeelliimmiitteerrss
     unsupported \!: 1u
     unsupported \r: 042u
     ignored \%: 1u
     ignored \&: 1u
     ignored \): 1u
     ignored \,: 042u
     ignored \/: 1u
     ignored \^: 042u
     ignored \a: 042u
     ignored \d: 042u
     ignored \t: 042u
     ignored \u: 042u
     ignored \{: 1u
     ignored \|: 042u
     ignored \}: 1u
     useless \.: 042.u
     invalid \G: 1u
     special \ : 042 u
     special \': 1u
     special \-: 1u
     special \0: 042 u
     special \:: 1u
     special \_: 1u
     special \`: 1u
     special \e: 1u
     special \~: 042 u
     break \p: 1u
     nospace \c: 1u
     string expansion: 1u
     register expansion: 03u
     ignored \O: 042u
     ignored \Y: 042u
     ignored \k: 1u
     special character: 1u
     ignored \D: 042u
     ignored \L: 042u
     ignored \X: 042u
     ignored \Z: 042u
     ignored \b: 042u
     ignored \v: 042u
     ignored \x: 042u
     horizontal motion: 042   u
     horizontal line: 042__u
     overstrike: 042cdu

OpenBSD                          June 8, 2022                          OpenBSD