How to write an if-else statement for a function

The function is:

f(n) = sqrt(1 + f(n-1)) if n>1 and f=2 if n=1

but I don't know how to start even.

[Sofie Önnemar]

for n=
    if n>1
        f=sqrt(1+(n-1));
    else
        f=2;
    end
end

this is what I got, but what do I write in the start with n= ???? to get the correct values?

Answer 1

[Michael]

if n>1
    f = sqrt(1 + f(n-1));
elseif n == 1
    f=2;
else
    f = NaN;
end

[Michael]

Might want to check out the Matlab Onramp course.

Answer 2

[Torsten]

n = 6;

f = 2;
for i = 2:n
  f = sqrt(1+f);
end
f

f = 1.6191

finf = 0.5+sqrt(0.5^2+1)

finf = 1.6180