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# Scala Set forall() method with example

The forall() method is utilized to check if the given predicate satisfies all the elements of the set or not.

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

Return Type: It returns true if the stated predicate holds true for all the elements of the set else it returns false.

Example #1:

 `// Scala program of forall()  ` `// method  ` ` `  `// Creating object  ` `object` `GfG  ` `{  ` ` `  `    ``// Main method  ` `    ``def` `main(args``:``Array[String])  ` `    ``{  ` `        ``// Creating a set  ` `        ``val` `s``1` `=` `Set(``3``, ``6``, ``12``, ``9``, ``21``)  ` `         `  `        ``// Applying forall method  ` `        ``val` `result ``=` `s``1``.forall(y ``=>` `{y ``%` `3` `==` `0``})  ` `         `  `        ``// Displays output  ` `        ``println(result)  ` `     `  `    ``}  ` `}  `

Output:

```true
```

Example #2:

 `// Scala program of forall()  ` `// method  ` ` `  `// Creating object  ` `object` `GfG  ` `{  ` ` `  `    ``// Main method  ` `    ``def` `main(args``:``Array[String])  ` `    ``{  ` `        ``// Creating a set  ` `        ``val` `s``1` `=` `Set(``3``, ``7``, ``12``, ``9``, ``21``)  ` `         `  `        ``// Applying forall method  ` `        ``val` `result ``=` `s``1``.forall(y ``=>` `{y ``%` `3` `==` `0``})  ` `         `  `        ``// Displays output  ` `        ``println(result)  ` `     `  `    ``}  ` `}  `

Output:

```false
```

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