Course of Raku / Essentials / Conditional checks / Ternary operator
Quiz — Ternary operator
Fill in the gaps in the program:
| . | my $color = prompt 'What colour is it? '; |
| ?? | say $color eq 'blue' ␣␣ |
| !! | 'This is a sky!' ␣␣ |
| . | 'I need more information.'; |
Comment
The Rakudo compiler has a special error message for the most common error you can make when using the ternary operator in Raku.
===SORRY!=== Error while compiling /Users/ash/raku-course/t.raku
Unsupported use of ? and : for the ternary conditional operator. In
Raku please use: ?? and !!.
at /Users/ash/raku-course/t.raku:2
------> say $color eq 'blue' ?⏏ 'This is a sky!' : 'I need more informa
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