ela>x=1  
ela>x==1  
true  
ela>x==2  
false  
ela>if x==1 then "ok" else "wtf?"  
"ok"  
ela>y=(if x==2 then "ok" else "wtf?")  
ela>y  
"wtf?"
ela>5%2  
1  
ela>10%2  
0  
ela>even? x = if x%2 == 0 then "even" else "odd"  
ela>even? 44  
"even"  
ela>even? 11  
"odd"
ela>even x = x%2 == 0  
ela>even 33  
false  
ela>even 2  
true