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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
no closing delimiter: 0
OpenBSD July 4, 2017 OpenBSD
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