I/if and E/else

Keywords I/if and E/else

I <condition>
   ...

I <condition>
   ...
E
   ...

I <condition1>
   ...
E I <condition2>
   ...

I <condition1>
   ...
E I <condition2>
   ...
E
   ...

Two consecutive keywords

else

and

if

are treated especially, so there is no need for a separate/additional keyword like

elif

in Python or

elsif

in Ruby.

Also

if

and

else

can be used in expressions similarly to ternary operator

?:

from C:

sign = I x < 0 {-1} E I x > 0 {1} E 0 // 11l

sign =  x < 0 ? -1  :  x > 0 ? 1 : 0; // C

I/if subkeywords

I.likely <condition>
   ...

is used as a sign to the compiler that condition in most of the cases will be true.

And similarly:

I.unlikely <condition>
   ...

is used as a sign to the compiler that condition in most of the cases will be false.

Note: at the present moment performance increase when using this subkeywords is negligible, so their usage is not recommended.