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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'
clojure
(def person "Bob")
(if (= person "Bob")
(println "Hello, Bob!"))
(def person "Bob")
(if (= person "Bob")
(println "Hello, Bob!"))
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).
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
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