Template:Ifinteger/doc

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The {{ifint}}, {{ifinteger}} or {{if integer}} if-then-else function template returns {{{2|1}}} if {{{1|}}} is an integer, otherwise returns {{{3|0}}}.

The {{is integer}} predicate function template returns 1 (if true) or 0 (if false.)

Usage

{{ifint|input|output if true (optional, default: 1)|output if false (optional, default: 0)}}

or

{{ifinteger|input|output if true (optional, default: 1)|output if false (optional, default: 0)}}

or

{{if integer|input|output if true (optional, default: 1)|output if false (optional, default: 0)}}

or

{{is integer|input}}

Examples

Examples where an integer is recognized

Code	Result	Comment
{{is integer|0}}	1
{{is integer|-0}}	1
{{is integer|1}}	1
{{is integer|-34}}	1
{{if integer|1|an integer|not an integer}}	an integer
{{if integer|+1000|an integer|not an integer}}	an integer
{{if integer|10.0|an integer|not an integer}}	an integer
{{if integer|10.00|an integer|not an integer}}	an integer
{{ifinteger|99.98674e5|an integer|not an integer}}	an integer
{{ifinteger|99.98674e6|an integer|not an integer}}	an integer
{{ifinteger|99.98674e10|an integer|not an integer}}	an integer
{{ifinteger|99.98674E10|an integer|not an integer}}	an integer
{{ifinteger|-99.98674e+10|an integer|not an integer}}	an integer
{{ifinteger|99.986746354298976E20|an integer|not an integer}}	an integer
{{ifint|2^48|an integer|not an integer}}	an integer
{{ifint|2^128|an integer|not an integer}}	an integer
{{expr|1 / (2^1024 - 1)}}	0
{{ifint|1 / (2^1024 - 1)|an integer|not an integer}}	an integer
{{expr|(2^1024 / 2^1024)^0}}	1
{{ifint|(2^1024 / 2^1024)^0|an integer|not an integer}}	an integer
{{ifinteger|{{formatnum:999,999,999,999,999|R}}|yes|no}}	yes
{{ifinteger|{{formatnum:999,999,999,999,999,999|R}}|yes|no}}	yes

Examples where no integer is recognized

Code	Result	Comment
{{is integer}}	0
{{is integer|one}}	0
{{is integer|-0.1}}	0
{{is integer|0.897}}	0
{{is integer|1.523}}	0
{{is integer|-34.2}}	0
{{is integer|pi}}	0
{{ifinteger|99.98674e-10|an integer|not an integer}}	not an integer
{{ifinteger|99.98674e2|an integer|not an integer}}	not an integer
{{ifinteger|99.98674e4|an integer|not an integer}}	not an integer
{{ifinteger|99 balloons|an integer|not an integer}}	not an integer
{{ifinteger|one|an integer|not an integer}}	not an integer
{{ifinteger|1,000.50|an integer|not an integer}}	not an integer
{{ifinteger|1,000|an integer|not an integer}}	not an integer
{{expr|2^1024 - 1}}	INF	(Cf. Maximum and minimum numbers allowed)
{{ifint|2^1024 - 1|an integer|not an integer}}	an integer
{{expr|2^1024 - 2^1024}}	NAN
{{ifint|2^1024 - 2^1024|an integer|not an integer}}	not an integer	(undefined)
{{expr|2^1024 / 2^1024}}	NAN
{{ifint|2^1024 / 2^1024|an integer|not an integer}}	not an integer	(undefined)
{{expr|2^1024 + 2^1024 / 2^1024}}	NAN
{{ifint|2^1024 + 2^1024 / 2^1024|an integer|not an integer}}	not an integer	(undefined)

Formatted numbers

This template requires unformatted numbers, it will not recognize formatted numbers, e.g. comma separated, which is by design since formatted numbers will break expression parsers. To remove the formatting from a number, you can wrap the number first in {{formatnum:number|R}}.

code	result
{{ifinteger|1,000.50|an integer|not an integer}}	not an integer
{{ifinteger|{{formatnum:1,000.50|R}}|an integer|not an integer}}	not an integer
{{ifinteger|1,000|an integer|not an integer}}	not an integer
{{ifinteger|{{formatnum:1,000|R}}|an integer|not an integer}}	an integer

Code

{{#iferror: {{#expr: {{{1|NAN}}} }}
| {{{3|0}}}
| {{#ifexpr: floor ( {{{1}}} ) = ( {{{1}}} )
  | {{{2|1}}}
  | {{{3|0}}}
  }}
}}

See also

• {{ifint}} or {{ifinteger}} or {{if integer}} or {{is integer}}
• {{ifnum}} or {{ifnumber}} or {{if number}} or {{is number}}