# Scala Set diff() method with example

The diff() method is utilized to compute the difference of a set and an another set.

Method Definition: def diff(that: Set[A]): Set[A]

Return Type: It returns a set which is the difference between two sets.

Example #1:

 `// Scala program of diff() ` `// method ` ` `  `// Creating object  ` `object` `GfG  ` `{  ` ` `  `    ``// Main method  ` `    ``def` `main(args``:``Array[String])  ` `    ``{  ` `     `  `        ``// Creating sets  ` `        ``val` `s``1` `=` `Set(``1``, ``2``, ``3``, ``4``, ``5``) ` `         `  `        ``val` `s``2` `=` `Set(``1``, ``2``, ``3``) ` `         `  `        ``// Applying diff method  ` `        ``val` `s``3` `=` `s``1``.diff(s``2``)  ` `         `  `        ``// Displays output  ` `        ``for``(elem ``<``- s``3``)   ` `        ``println(elem)  ` `     `  `    ``}  ` `}  `

Output:

```5
4
```

Example #2:

 `// Scala program of diff() ` `// method ` ` `  `// Creating object  ` `object` `GfG  ` `{  ` ` `  `    ``// Main method  ` `    ``def` `main(args``:``Array[String])  ` `    ``{  ` `     `  `        ``// Creating sets  ` `        ``val` `s``1` `=` `Set(``1``, ``2``, ``3``, ``4``, ``5``) ` `         `  `        ``val` `s``2` `=` `Set(``6``, ``2``, ``7``, ``8``) ` `         `  `        ``// Applying diff method  ` `        ``val` `s``3` `=` `s``1``.diff(s``2``)  ` `         `  `        ``// Displays output  ` `        ``for``(elem ``<``- s``3``)   ` `        ``println(elem)  ` `     `  `    ``}  ` `}  `

Output:

```5
1
3
4
```

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