Semiconductor & Computer Engineering
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Difference between revisions of "mirc/identifiers/$isnumber"
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== Synopsis == | == Synopsis == | ||
<source lang="mIRC"> | <source lang="mIRC"> | ||
| − | $isnumber(text,[ | + | $isnumber(text,[sd],[I,J])</source> |
== Parameters == | == Parameters == | ||
* '''text''' - The input string to be checked<br /> | * '''text''' - The input string to be checked<br /> | ||
| − | + | * '''s''' - also permits +- sign to be used | |
| − | + | * '''d''' - also permits the decimal, allowing numbers with fractions | |
| − | + | * '''[I,J]''' - If you pass a third and fourth parameters, they must be valid number (with respect to the switches used) and are used to validate the number in a range. | |
| − | |||
== Properties == | == Properties == | ||
| Line 25: | Line 24: | ||
<source lang="mIRC">//echo -a $isnumber(abcdefG)</source> | <source lang="mIRC">//echo -a $isnumber(abcdefG)</source> | ||
| − | will return '''$false''' because not all the | + | will return '''$false''' because not all the characters are digits |
| Line 31: | Line 30: | ||
result: $false vs $true (using a sign requires 's') | result: $false vs $true (using a sign requires 's') | ||
| − | <pre>//echo -a $isnumber(3,d,2.1,4) vs $isnumber(3,2.1,4)</pre> | + | <pre>//echo -a $isnumber(3,d,2.1,4) vs $isnumber(3,,2.1,4)</pre> |
| − | result:$false vs error, the d switches is required not only to allow decimal in the input, but in each range parameter as well | + | result: $false vs error, the d switches is required not only to allow decimal in the input, but in each range parameter as well |
== Compatibility == | == Compatibility == | ||
| Line 38: | Line 37: | ||
== See also == | == See also == | ||
* {{mIRC|$calc}} | * {{mIRC|$calc}} | ||
| + | * {{mIRC|$isnum}} | ||
Latest revision as of 23:58, 16 August 2022
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$isnumber Returns $true if text is a number, otherwise returns $false.
Note: switches affects the range number parameters, see the examples
Synopsis[edit]
$isnumber(text,[sd],[I,J])
Parameters[edit]
- text - The input string to be checked
- s - also permits +- sign to be used
- d - also permits the decimal, allowing numbers with fractions
- [I,J] - If you pass a third and fourth parameters, they must be valid number (with respect to the switches used) and are used to validate the number in a range.
Properties[edit]
None
Example[edit]
//echo -a $isnumber(564)
will return $true
//echo -a $isnumber(abcdefG)
will return $false because not all the characters are digits
//var %a -123 | echo -a $isnumber(%a) vs $isnumber(%a,s)
result: $false vs $true (using a sign requires 's')
//echo -a $isnumber(3,d,2.1,4) vs $isnumber(3,,2.1,4)
result: $false vs error, the d switches is required not only to allow decimal in the input, but in each range parameter as well
Compatibility[edit]
Added: mIRC v7.58
Added on: 17 Nov 2019
Note: Unless otherwise stated, this was the date of original functionality.
Further enhancements may have been made in later versions.