Difference between method and function in Scala

Question

I read Scala Functions (part of Another tour of Scala). In that post he stated:

Methods and functions are not the same thing

Answer 1

Let Say you have a List

scala> val x =List.range(10,20)
x: List[Int] = List(10, 11, 12, 13, 14, 15, 16, 17, 18, 19)

Define a Method

scala> def m1(i:Int)=i+2
m1: (i: Int)Int

Define a Function

scala> (i:Int)=>i+2
res0: Int => Int = 

scala> x.map((x)=>x+2)
res2: List[Int] = List(12, 13, 14, 15, 16, 17, 18, 19, 20, 21)

Method Accepting Argument

scala> m1(2)
res3: Int = 4

Defining Function with val

scala> val p =(i:Int)=>i+2
p: Int => Int = 

Argument to function is Optional

 scala> p(2)
    res4: Int = 4

scala> p
res5: Int => Int = 

Argument to Method is Mandatory

scala> m1
:9: error: missing arguments for method m1;
follow this method with `_' if you want to treat it as a partially applied function

Check the following Tutorial that explains passing other differences with examples like other example of diff with Method Vs Function, Using function as Variables, creating function that returned function