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language:	Prolog (gnu) (gprolog-1.3.1)
date:	104 days 5 hours ago
link:
visibility:	public private user's deleted

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1
is_even(X) :- 0 is mod(X,2).

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# 3 # 2 # 1

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# 3: hide show clone input 104 days 5 hours ago Success

result: Success time: 0.02s memory: 68352 kB returned value: 0
input:
```
is_even(5).
```
output:
```
GNU Prolog 1.3.1
By Daniel Diaz
Copyright (C) 1999-2009 Daniel Diaz

no
```
# 2: hide show clone input 104 days 5 hours ago Success

result: Success time: 0.01s memory: 68352 kB returned value: 0
input:
```
is_even(4).
```
output:
```
GNU Prolog 1.3.1
By Daniel Diaz
Copyright (C) 1999-2009 Daniel Diaz

yes
```
# 1: hide show clone input 104 days 5 hours ago Success

result: Success time: 0.01s memory: 68352 kB returned value: 0

input: no
output:
```
GNU Prolog 1.3.1
By Daniel Diaz
Copyright (C) 1999-2009 Daniel Diaz
```