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In computer science, values may be of first-class, second-class, or third-class:
| assignable | passable as parameter | passable as return value[?] |
|
| First-class | yes | yes | yes |
| Second-class | yes | yes | no |
| Third-class | yes | no | no |
In many programming languages, labels are third-class values while numerical values are first-class values. A few languages use this kind of exact distinction.
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