if

Evaluates a conditional statement.
　if <conditional statement> ({&&,&} <conditional statement>) <commands>
The commands following the if statement are executed if the conditional statement(s) evaluate true; if you want branch control in which a command executes if a conditional statement is false, use notif.
The conditions can compare numerical values, else you can employ fchk.
& and && are logical 'ands', and are equivalent to one another.

　　　<Conditions>
　　　<numerical variable> {>,<,=,>=,<=,==,!=,<>} <numerical variable>
　　　- or -
　　　fchk <character string>

　　　<,>，=，>=，<= should already be known to you.
　　　== and = are identical, as are != and <>.
　　　As for fchk, it returns true when the image whose name corresponds to the character string is being used.

　　　　EX）
　　　　if %0=1 quakex 2　（basic form）
　　　　if %0=1 && %2=5 end　（multiple conditions）
　　　　if %0=2 mov %1,1:skip 2 （append additional commands with :）
　　　　notif %0=1 quakex 2　（in C, this would be if(%0!=1) quakex 2;）