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Scala Queue exists() method with example
• Last Updated : 24 Oct, 2019

The exists() method is utilized to check whether a predicate holds for any of the elements of the queue.

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

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

Example #1:

 `// Scala program of exists() ``// 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 exists method ``        ``val` `result ``=` `q``1``.exists(x ``=>` `{x ``%` `7` `==` `0``}) ``         ` `        ``// Displays output ``        ``print(``"Element divisible by 7 exists: "` `+ result)``    ``} ``} `
Output:
```Queue(1, 3, 2, 7, 6, 5)
Element divisible by 7 exists: true
```

Example #2:

 `// Scala program of exists() ``// 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 exists method ``        ``val` `result ``=` `q``1``.exists(x ``=>` `{x ``==` `10``}) ``         ` `        ``// Displays output ``        ``print(``"Element 10 exists: "` `+ result)``    ``} ``} `
Output:
```Queue(1, 3, 2, 7, 6, 5)
Element 10 exists: false
```

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