Scientific Calculator

SasanM/isFibonacci

By sasan

test if the argument is a fibonacci number

is_fib=function(fi){
   var a=0;
    var b=1;
    var c=0;
    var i=2;
 
while (i < fi) -> (
    c=a+b;
    a=b;
    b=c;
    if (c==fi) -> i=fi;
    i +=1;
    ); 
  i -=1;
  if (i == fi) -> "true"  else "false";
}

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