Middle three digits: Difference between revisions

ELENA 3.4.x :

<lang elena>import system'routines.;

import extensions.;

literalstring s := n absolute.Absolute.toString(); toLiteral.

int len := s length.Length;

[{

InvalidArgumentException .new:"n must have 3 digits or more"; .raise()

];}

else if(len .isEven())

[{

InvalidArgumentException .new:"n must have an odd number of digits"; .raise()

].};

int mid := len / 2.;

^ s .Substring(mid-1,3).

public program()

(new int[]{123, 12345, 1234567, 987654321, 10001, -10001, -123, -100, 100, -12345, 1, 2, -1, -10, 2002, -2002, 0)}

.forEach(:(n)

[ {

console console.printLine("middleThreeDigits(",n,"):",middleThreeDigits(n) | if(on:e)(e message=> e.Message))

] }

]}</lang>