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Structure
Conditionals
Perform an action if a condition is true (IF .. THEN)
Given a variable name, if the value is
"Bob"
, display the string
"Hello, Bob!"
. Perform no action if the name is not equal.
ruby
if (name=='Bob')
puts "Hello, Bob!"
end
if (name=='Bob')
puts "Hello, Bob!"
end
ruby
puts "Hello, Bob!" if name=='Bob'
puts "Hello, Bob!" if name=='Bob'
cpp
C++/CLI .NET 2.0
if (name == "Bob") Console::WriteLine("Hello, {0}!", name);
using namespace System;
int main()
{
String^ name = "Bob";
if (name == "Bob") Console::WriteLine("Hello, {0}!", name);
}
cpp
if (name == "Bob") std::cout << "Hello, " << name << "!" << std::endl;
int main()
{
std::string name = "Bob";
if (name == "Bob") std::cout << "Hello, " << name << "!" << std::endl;
}
fsharp
if name = "Bob" then printfn "Hello, %s!" name
#light
open System
let name = "Bob"
if name = "Bob" then printfn "Hello, %s!" name
fsharp
name = "Bob" && begin printfn "Hello, %s!" name ; true end
#light
open System
let name = "Bob"
name = "Bob" && begin printfn "Hello, %s!" name ; true end
erlang
if (Name == "Bob") -> io:format("Hello, ~s!~n", [Name]) ; true -> false end.
-module(ifthen).
-export([start/0]).
start() ->
Name = "Bob",
if (Name == "Bob") -> io:format("Hello, ~s!~n", [Name]) ; true -> false end.
erlang
case Name of "Bob" -> io:format("Hello, ~s!~n", [Name]) ; _ -> false end.
-module(ifthen).
-export([start/0]).
start() ->
Name = "Bob",
case Name of "Bob" -> io:format("Hello, ~s!~n", [Name]) ; _ -> false end.
erlang
Name == "Bob" andalso (begin io:format("Hello, ~s!~n", [Name]), true end).
-module(ifthen).
-export([start/0]).
start() ->
Name = "Bob",
Name == "Bob" andalso (begin io:format("Hello, ~s!~n", [Name]), true end).
csharp
if (name == "Bob") Console.WriteLine("Hello, {0}!", name);
if (name == "Bob") Console.WriteLine("Hello, {0}!", name);
haskell
name = "Bob"
main = if name == "Bob" then putStrLn "Hello, Bob!" else return ()
name = "Bob"
main = if name == "Bob" then putStrLn "Hello, Bob!" else return ()
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