# Scala Queue forall() method with example

• Last Updated : 24 Oct, 2019

The forall() method is utilized to check if a predicate holds true for all the elements of the queue.

Method Definition: def forall(p: (A) => Boolean): Boolean

Return Type: It returns true if the predicate holds true for all the elements of the queue or else returns false.

Example #1:

 `// Scala program of forall() ``// method `` ` `// Import Queue  ``import` `scala.collection.mutable.``_`` ` `// Creating object ``object` `GfG ``{ `` ` `    ``// Main method ``    ``def` `main(args``:``Array[String]) ``    ``{ ``     ` `        ``// Creating queues ``        ``val` `q``1` `=` `Queue(``1``, ``3``, ``2``, ``7``, ``6``, ``5``) ``         ` `        ``// Print the queue``        ``println(q``1``)``         ` `        ``// Applying forall method ``        ``val` `result ``=` `q``1``.forall(x ``=>` `{x ``%` `7` `==` `0``}) ``         ` `        ``// Displays output ``        ``print(``"All the elements are divisible by 7: "` `+ result)``    ``} ``} `

Output:

```Queue(1, 3, 2, 7, 6, 5)
All the elements are divisible by 7: false
```

Example #2:

 `// Scala program of forall() ``// method `` ` `// Import Queue  ``import` `scala.collection.mutable.``_`` ` `// Creating object ``object` `GfG ``{ `` ` `    ``// Main method ``    ``def` `main(args``:``Array[String]) ``    ``{ ``     ` `        ``// Creating queues ``        ``val` `q``1` `=` `Queue(``1``, ``3``, ``7``, ``5``) ``         ` `        ``// Print the queue``        ``println(q``1``)``         ` `        ``// Applying forall method ``        ``val` `result ``=` `q``1``.forall(x ``=>` `{x ``%` `2` `!``=` `0``}) ``         ` `        ``// Displays output ``        ``print(``"All the elements are odd: "` `+ result)``    ``} ``} `

Output:

```Queue(1, 3, 7, 5)
All the elements are odd: true
```

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