Casting is the conversion of data types for compatibility within methods. For example, a list is cast to a string whenever it is used as a string input. So joining a list [a, b, c] to "... is a list" will return the string "a b c ... is a list".
Rules
Casting in Scratch follows the following rules:
| Casting Rules | String input | Number input | |
|---|---|---|---|
| Strings | String: "abc" |
"abc" | 0 |
| String: "123" |
"123" | 123 | |
| Numbers | Number: 123 |
"123" | 123 |
| Booleans | Boolean: true |
"true" | 1 |
| Boolean: false |
"false" | 0 | |
| Lists | List: ["a", "b", "c"] |
"abc" | 0 |
| List: ["a", "b", "c", "are the letters"] |
"a b c are the letters" | 0 | |
| List: ["1", "2", "3"] |
"123" | 123 | |
| List: [1, 2, 3] |
"1 2 3" | 0 | |
| List: [1, 22, 3] |
"1 22 3" | 0 | |
| List: ["3", ".", "1", "4"] |
"3.14" | 3.14 | |
| List: [3, ".", 1, 4] |
"3 . 1 4" | 0 | |
| List: [] |
"" | 0 | |
See Also
- This article or section documents an outdated version of Scratch (version 2.0). For this article in Scratch 1.4, see Casting (1.4).
