11 lines
123 B
Text
11 lines
123 B
Text
fib(n)={
|
|
if(n<0,return((-1)^(n+1)*fib(n)));
|
|
my(a=0,b=1,t);
|
|
while(n,
|
|
t=a+b;
|
|
a=b;
|
|
b=t;
|
|
n--
|
|
);
|
|
a
|
|
};
|