View Problem
Perform an action multiple times based on a boolean condition, checked before the first action (WHILE .. DO)
Starting with a variable x=1, Print the sequence 
ruby
cpp C++/CLI .NET 2.0
cpp
fsharp
fsharp
Submit a new solution for ruby, cpp, or fsharp
There are 15 other solutions in additional languages (clojure, csharp, erlang, fantom ...)
"1,2,4,8,16,32,64,128," by doubling x and checking that x is less than 150.
x=1
while x < 150
puts x
x <<= 1
end
while x < 150
puts x
x <<= 1
end
int x = 1;
while (x < 150) { x *= 2; Console::Write("{0},", x); }
Console::WriteLine();
while (x < 150) { x *= 2; Console::Write("{0},", x); }
Console::WriteLine();
for (int x = 1; x < 150; x *= 2) { std::cout << x << ","; }
std::cout << std::endl;
std::cout << std::endl;
let mutable x = 1
while x < 150 do printf "%d, " x ; (x <- x * 2) done
while x < 150 do printf "%d, " x ; (x <- x * 2) done
// The problem is clearly geared towards imperative languages ;-)
// No need to mutate any variable, here's how to do it loop-free functional:
let rec powers2 i = seq { if i < 150 then yield i; yield! powers2 (i*2) }
powers2 1 |> Seq.iter (fun i -> printf "%i, " i)
// No need to mutate any variable, here's how to do it loop-free functional:
let rec powers2 i = seq { if i < 150 then yield i; yield! powers2 (i*2) }
powers2 1 |> Seq.iter (fun i -> printf "%i, " i)
Submit a new solution for ruby, cpp, or fsharp
There are 15 other solutions in additional languages (clojure, csharp, erlang, fantom ...)
