Write an interpreter for *

Question

The task is simple. Write an interpreter for the language *.

Here's a bigger link to the wiki.

There are only three valid * programs:

• * Prints "Hello World"
•  *  Prints a random number between 0 and 2,147,483,647
• *+* Runs forever.

The third case must be an infinite loop according to the specifications in this question

Input:

• The input can be taken via any acceptable input method by our standard I/O rules
• It will always be one of the above programs

Output:

• The first case should print exactly Hello World, with or without a trailing line break.
• For the second case, if your language's integer maximum is smaller than 2,147,483,647, use your language's integer maximum
• The first and second cases can print to any acceptable output by our standard I/O rules.
• The third case should not give any output.

Scoring:

As this is code-golf, the shortest answer, in bytes, wins.

Answer 1

Wren, 143 135 bytes

I am not a good golfer... The RNG generates the same value each time because it is a pseudo-random number generator.

Fn.new{|a|
import"random"for Random
if(a=="*+*"){
while(1){}
}else System.write(a[0]==" "?Random.new(9).int((1<<31)-1):"Hello World")
}

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Answer 2

Kotlin, 78 bytes

{print(if(it<"*")(0..2147483647).random()else{while(it>"*"){}
"Hello World"})}

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Answer 3

VBScript, 147 bytes

Sub m(s)
randomize:i=0
if s="*" then msgbox "Hello World"
if s=" * " then msgbox int(2147483647*Rnd)
if s="*+*" then
do
loop while 1
end if
end sub

Answer 4

Crystal, 75 bytes

puts case gets;when"*";"Hello World"when/\+/;loop{}else;rand 2147483647;end

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Answer 5

05AB1E, 21 bytes

['*›_#}gi„Ÿ™‚ï™ëžIL<Ω

Try it online! * times out on TIO as the code generates the list [1, 2, 3, ..., 2147483648], subtracts 1 from each element, and picks a random element from the list. This is required as the only sources of randomness in 05AB1E are Ω/.R (random pick) and .r (random shuffle), but no pure RNGs.

['*›_#}gi„Ÿ™‚ï™ëžIL<Ω  # full program
     #                 # break out of...
[                      # infinite loop...
     #                 # if...
                       # implicit input...
   ›                   # does...
    _                  # not...
   ›                   # come after...
 '*                    # literal...
   ›                   # in lexicographical order
      }                # end infinite loop
        i              # if...
       g               # length of...
                       # implicit input...
        i              # is 1...
         „Ÿ™‚ï         # then push "hello world"...
              ™        # in title case
               ë       # else...
                    Ω  # pick a random element from...
                  L    # [1, 2, 3, ...,
                žI     # ..., 2147483648]...
                       # (implicit) with each element...
                   <   # decremented
                       # implicit output