Learning Erlang 3 Variables

dynamic_typing.erl

1> 1 + 1.0.
2.0

2> 2.0 + 1.
3.0

3> 4 + 45.
49

4> 45 /0.5.
90.0

5> 2.0 + a.
** exception error: bad argument in an arithmetic expression
     in operator  +/2
        called as 2.0 + a

multiple_assignments.erl

7> [A,B,C] = ["Keep", "it", "simple"].
["Keep", "it", "simple]

8> A.
"Keep"

9> B.
"it"

10> C.
"simple"

variables.erl

%% Declaration is not needed.
1> Variable.
* 1: variable 'Variable' is unbound

%% Declare an assign at the same time
2> Variable = 'an atom'.
'an atom'

%% Valid variable names
3> Long_variable_name_In_here = 1.
1
4> AlphaNum3r1c = "a1".
"a1"

%% Non valid names
5> Non-Valid? = ups.
* 1: syntax error before: '?'

variables_inmutables.erl

1> Count = 1.
1

2> Count = Count + 1.
** exception error: no match of right hand side value 2

3> NewCount = Count + 1.
2