Strong typing is very important in functional programming
Most scripting like Ruby, Python, etc. are dynamically typed, which is supposed to be one of their advantages.
Static typing makes programming much safer.
But sometimes types declarations become a burden.
Scala’s type inferencing mechanism minimizes the number of type declarations required.
It’s not uncommon for user code to have no explicit types.

Data Types Byte : 8 bit signed value. Range from -128 to 127
Short : 16 bit signed value. Range -32768 to 32767 Int : 32 bit signed value. Range - to
Long : 64 bit signed value. -9223372036854775808 to 9223372036854775807
Float : 32 bit IEEE 754 single-precision float
Double : 64 bit IEEE 754 double-precision float Char : 16 bit signed Unicode character. Range from U+0000 to U+FFFF
String : A sequence of Chars
Boolean : Either the literal true or the literal false Unit: Corresponds to no value : void
Null: null or empty reference
Nothing : The subtype of every other type; includes no values Any: The supertype of any type; any object is of type
Any : Java's Object class
AnyRef: The supertype of any reference type


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