Document continue and for with empty parts. Also, our implementation

allows for scale > 99.

1 files changed, 22 insertions, 7 deletions

diff --git a/usr.bin/bc/USD.doc/bc b/usr.bin/bc/USD.doc/bc
index ac7e633a52a..91832f367fc 100644
--- a/usr.bin/bc/USD.doc/bc
+++ b/usr.bin/bc/USD.doc/bc
@@ -1,4 +1,4 @@
-.\"	$OpenBSD: bc,v 1.2 2003/10/19 18:16:51 otto Exp $
+.\"	$OpenBSD: bc,v 1.3 2003/10/21 11:58:46 otto Exp $
 .\"
 .\" Copyright (C) Caldera International Inc.  2001-2002.
 .\" All rights reserved.
@@ -285,10 +285,14 @@ A third special internal quantity called `scale' is
 used to determine the scale of calculated
 quantities.
 Numbers may have
-up to 99 decimal digits after the decimal point.
+up to a specific number of decimal digits after the decimal point.
 This fractional part is retained in further computations.
 We refer to the number of digits after the decimal point of
 a number as its scale.
+The current implementation allows scales to be as large as can be
+represented by a 32-bit unsigned number minus one.
+This is a non-portable extension.
+The original implementation allowed for a maximum scale of 99.
 .PP
 When two scaled numbers are combined by
 means of one of the arithmetic operations, the result
@@ -318,9 +322,7 @@ not rounding is performed.
 .PP
 The contents of
 `scale' must be no greater than
-99 and no less than 0.  It is initially set to 0.
-In case you need more than 99 fraction digits, you may arrange
-your own scaling.
+4294967294 and no less than 0.  It is initially set to 0.
 .PP
 The internal quantities `scale', `ibase', and `obase' can be
 used in expressions just like other variables.
@@ -775,7 +777,7 @@ The following are reserved keywords:
 	sqrt	auto
 	length	return
 	while	quit
-	for
+	for	continue
 .fi
 .ft
 .NH 2
@@ -1103,7 +1105,8 @@ The for statement is the same as
 .ft R
 .fi
 .PP
-All three expressions must be present.
+All three expressions may be left out.
+This is a non-portable extension.
 .NH 2
 Break statements
 .sp .5
@@ -1111,6 +1114,18 @@ Break statements
 .PP
 \fBbreak\fP causes termination of a \fBfor\fP or \fBwhile\fP statement.
 .NH 2
+Continue statements
+.sp .5
+\fBcontinue\fP
+.PP
+\fBcontinue\fP causes the next iteration of a \fBfor\fP or \fBwhile\fP
+statement to start, skipping the remainder of the loop.
+For a \fBwhile\fP statement, execution continues with the evaluation
+of the condition.
+For a \fBfor\fP statement, execution continues with evaluation of
+the last-expression.
+The \fBcontinue\fP statement is a non-portable extension.
+.NH 2
 Auto statements
 .sp .5
 \fBauto \fIidentifier\fR\|[\|\fB,\fIidentifier\fR\|]