Programming with Expressions

Working with basic types

Blabla.

You can concatenate various text values by using the '+' operator.

'Hello' + ', ' + 'World!'

7   // an integer

7L  // a long

BigInteger('7')

You can work with numbers using arithmetic operators.

4 * 10 + 2

100 / 7

100 % 7

yearsBetween(dateOfBirth, today)

{
    let numbers = [ 10, 100, 142, 47];
    numbers.sum
}

4.0 * 10 + 2

100.0 / 7.0

BigDecimal('3010.45')

Date(2026, 11, 30)

DateTime(2026, 11, 30, 12, 0, 0)

{
    let x = 41;
    x + 1
}

[]      // an empty list

['This', 'is', 'a', 'list', 'of', 'text']  // List[Text]

IRange(0, 10)   // An inclusive range that contains its min and max bounds

ERange(0, 10)   // An exclusive range that does not contain its min and max bounds

The following expression will compute the sum of all integer numbers from 1 to n = 1 + ... + n

IRange(1, n).sum

Set('a', 'b', 'c')

{
    let criteriaSatisfied = c: Customer => c.age >= 18;
    if criteriaSatisfied(joe) 'You are eligibile' 
    else 'Sorry, you are not eligible'
}

IRange(0, 100).