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284
Chapter 2: ColdFusion Tags
cfloop: index loop
Description
An index loop repeats for a number of times that is determined by a numeric value. An index loop
is also known as a FOR loop.
Syntax
<cfloop
index = "parameter_name"
from = "beginning_value"
to = "ending_value"
step = "increment">
... HTML or CFML code ...
</cfloop>
See also
cfabort
,
cfbreak
,
cfdirectory
,
cfexecute
,
cfexit
,
cfif
,
cflocation
,
cfrethrow
,
cfswitch
,
cfthrow
,
cftry
; “cfloop and cfbreak” in Chapter 2, “Elements of CFML,” in
ColdFusion MX Developer’s Guide
Attributes
Usage
Using anything other than integer values in the
from
and
to
attributes of an index loop can
product unexpected results. For example, if you increment through an index loop from 1 to 2,
with a step of 0.1, ColdFusion outputs "1,1.1,1.2,...,1.9", but not "2". This is a programming
language problem regarding the internal representation of floating point numbers.
Note:
The
to
value is evaluated once, when the
cfloop
tag is encountered. Any change to this value
within the loop block, or within the expression that evaluates to this value, does not affect the number
of times the loop is executed.
Example
In this example, the code loops five times, displaying the
index
value each time:
<cfloop index = "LoopCount" from = "1" to = "5">
The loop index is <cfoutput>#LoopCount#</cfoutput>.<br>
</cfloop>
The output of this loop is as follows:
The loop index is 1.
The loop index is 2.
Attribute
Req/Opt Default
Description
index
Required
Index value. ColdFusion sets it to the
from
value and
increments or decrements by
step
value, until it equals the
to
value.
from
Required
Beginning value of index.
to
Required
Ending value of index.
step
Optional
1
Step by which to increment or decrement the index value.
Содержание COLFUSION MX 7-CFML
Страница 1: ...COLDFUSION MX7 CFML Reference...
Страница 20: ...20 Chapter 1 Reserved Words and Variables...
Страница 50: ...50 Chapter 2 ColdFusion Tags cfelse br Searching cfif cfloop cfif...
Страница 101: ...cfdefaultcase 101 cfdefaultcase cfswitch cfoutput Your grade is grade cfoutput...
Страница 115: ...cfdocumentsection 115 cfdocumentsection cfoutput cfdocument...
Страница 311: ...cfNTauthenticate 311 Please Try again H2 cfif cfoutput cfinclude template loginform cfm cfabort cfif cfif cflogin...
Страница 411: ...cftable 411 cftable body html...
Страница 515: ...Chr 515 maxlength 5 p input type Submit name input type RESET cfform...
Страница 605: ...GetEncoding 605 WriteOutput The encoding is theEncoding cfscript cfif...
Страница 629: ...GetProfileString 629 tr td input type Submit name Submit value Submit td td td tr table form...
Страница 655: ...IIf 655 cfoutput IIf Hour Now GTE 12 DE It is afternoon or evening DE It is morning cfoutput b...
Страница 664: ...664 Chapter 3 ColdFusion Functions cfelse h3 Conversion error h3 cfif...
Страница 687: ...IsStruct 687 cfoutput cfquery cfif cfoutput hr Employee Add Complete cfoutput cfcase cfswitch...
Страница 693: ...IsWDDX 693 struct data wddxPacket hr xmp cfoutput packet xmp IsWDDX returns IsWDDX packet br cfoutput...
Страница 751: ...LSDateFormat 751 hr noshade cfoutput cfloop...
Страница 861: ...StructFind 861 cfquery cfif cfoutput hr Employee Add Complete cfoutput cfcase cfswitch...
Страница 869: ...StructIsEmpty 869 cfoutput cfquery cfif cfoutput hr Employee Add Complete cfoutput cfcase cfswitch...
Страница 903: ...Val 903 value Is the beginning numeric name form...
Страница 932: ...932 Chapter 3 ColdFusion Functions...
Страница 944: ...944 Chapter 4 ColdFusion MX Flash Form Style Reference...
Страница 962: ...962 Chapter 5 Application CFC Reference...
Страница 1008: ...1008 Chapter 6 ColdFusion MX Event Gateway Reference cfset retValue Reason reason cfreturn retValue cffunction...
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