Difference between revisions of "ECHO"

From Recital Documentation Wiki
Jump to: navigation, search
 
(9 intermediate revisions by 2 users not shown)
Line 1: Line 1:
{{YLM todo}}
 
==Class==
 
Input/Output
 
 
 
 
==Purpose==
 
==Purpose==
 
Evaluate expression and output result
 
Evaluate expression and output result
Line 9: Line 4:
  
 
==Syntax==
 
==Syntax==
ECHO <exp> [,<exp>]
+
ECHO <exp> [, <exp>]
  
 
[AT <expN>]
 
[AT <expN>]
Line 16: Line 11:
  
 
[PICTURE <expC2>]
 
[PICTURE <expC2>]
 
[STYLE <expC3>]
 
  
  
 
==See Also==
 
==See Also==
[[@...GET]], [[@...SAY]], [[ACCEPT]], [[INPUT]], [[SET SPACE]], [[TRANSFORM()]], [[WAIT]]
+
[[?]], [[??]], [[@...GET]], [[@...SAY]], [[ACCEPT]], [[INPUT]], [[SET SPACE]], [[TRANSFORM()]], [[WAIT]]
  
  
 
==Description==
 
==Description==
 
The ECHO command evaluates the expression and displays the results on the same line, no carriage return/line feed sequence is output unless the <exp> is a character expression and contains the 'C' style escapes as shown below.  If more than one expression is specified and SET SPACE is ON, a single space is output between each expression.  If SET SPACE is OFF, the expressions are output with no space in between.
 
The ECHO command evaluates the expression and displays the results on the same line, no carriage return/line feed sequence is output unless the <exp> is a character expression and contains the 'C' style escapes as shown below.  If more than one expression is specified and SET SPACE is ON, a single space is output between each expression.  If SET SPACE is OFF, the expressions are output with no space in between.
 +
 +
The following escapes can be included in <exp> if it is a character expression:
 +
  
 
{| class="wikitable"
 
{| class="wikitable"
Line 37: Line 33:
 
|-
 
|-
 
|}
 
|}
 +
 +
The ECHO command also supports php-style $variable and {expression} substitutions in character strings.
  
  
Line 47: Line 45:
 
|-
 
|-
 
|FUNCTION <expC2>||The FUNCTION qualifier allows picture functions to be specified.  Normally this can be done with the PICTURE qualifier by preceding the picture with '@'.  If the FUNCTION qualifier is used the '@' is not needed.
 
|FUNCTION <expC2>||The FUNCTION qualifier allows picture functions to be specified.  Normally this can be done with the PICTURE qualifier by preceding the picture with '@'.  If the FUNCTION qualifier is used the '@' is not needed.
|-
 
|STYLE <expC3>||The STYLE qualifier has been added for compatibility with other Xbase languages.
 
|-
 
|}
 
 
In Recital Mirage, the following style qualifiers are supported in <expC3>:
 
 
 
{| class="wikitable"
 
!<expC3>||Style
 
|-
 
|B||Bold
 
|-
 
|I||Italic
 
|-
 
|U||Underline
 
|-
 
|-||Strikeout
 
 
|-
 
|-
 
|}
 
|}
Line 71: Line 51:
 
==Example==
 
==Example==
 
<code lang="recital">
 
<code lang="recital">
 +
echo "price" at 10 picture "@!",1234.56 picture "$9,999.99"
 +
echo "-----\n" at 10
 +
          PRICE $1,234.56
 +
          -----
  
 +
// php-style $variable and {expression} substitution
 +
m_date = date()
 +
echo "Today's date is {m_date}\n"
 
</code>
 
</code>
  
  
 
==Products==
 
==Products==
Recital Database Server, Recital Mirage Server, Recital Terminal Developer
+
Recital Server, Recital  
 
[[Category:Documentation]]
 
[[Category:Documentation]]
 
[[Category:Commands]]
 
[[Category:Commands]]
 +
[[Category:Input Output]]
 +
[[Category:Input Output Commands]]

Latest revision as of 15:53, 13 January 2010

Purpose

Evaluate expression and output result


Syntax

ECHO <exp> [, <exp>]

[AT <expN>]

[FUNCTION <expC1>]

[PICTURE <expC2>]


See Also

?, ??, @...GET, @...SAY, ACCEPT, INPUT, SET SPACE, TRANSFORM(), WAIT


Description

The ECHO command evaluates the expression and displays the results on the same line, no carriage return/line feed sequence is output unless the <exp> is a character expression and contains the 'C' style escapes as shown below. If more than one expression is specified and SET SPACE is ON, a single space is output between each expression. If SET SPACE is OFF, the expressions are output with no space in between.

The following escapes can be included in <exp> if it is a character expression:


Escape Description
\t Tab
\n New line
\r Carriage return

The ECHO command also supports php-style $variable and {expression} substitutions in character strings.


Clause Description
AT <expN> You may optionally specify the column at which the expression will be output with the AT <expN> clause.
PICTURE <expC1> The PICTURE clause supports all picture template symbols listed in the @...SAY command.
FUNCTION <expC2> The FUNCTION qualifier allows picture functions to be specified. Normally this can be done with the PICTURE qualifier by preceding the picture with '@'. If the FUNCTION qualifier is used the '@' is not needed.


Example

echo "price" at 10 picture "@!",1234.56 picture "$9,999.99"
echo "-----\n" at 10
          PRICE $1,234.56
          -----
 
// php-style $variable and {expression} substitution
m_date = date()
echo "Today's date is {m_date}\n"


Products

Recital Server, Recital