1. values and types (types of values, types of variables).
   • literal values of base types.
   • types (base and others).
   • base types (numeric, textual, others).
   • other types, beyond base.
   • compound types (lists, mappings, objects) and accessing ( read , write ).
   • values as literals, again (json literal as a compound literal).
2. operators and expressions.
   • expressions as composition of operators.
   • arithmetic operators.
   • boolean logical operators.
   • quantitative comparison operators.
   • other operators.
3. variables
   • variable declaration (name and type , scope , modifiers).
   • assign operation (value to be assigned to a variable).
   • initialization (first value assigned, initial value).
   • variables with one single fixed type or not (type chosen in a variable declaration or not).
   • constants variables (assigned once).
4. instructions of control flow also with blocks of instructions and memory operations.
   • [memory.] "assignment" instruction (instruction and operator).
   • [memory.] pure functions (no side effects on memory).
   • [memory.] "function call" instruction (input and output).
   • [flow: sequence.] blocks of instructions.
   • [flow: cycle.] "while" instruction with 1 block of instructions.
   • [flow: branching.] "if" instruction with 1 or 2 blocks of instructions.
5. functions (declaration and call).
   • functions as values (that can be assigned to variables etc).
   • function call (input and output of values).
   • function declaration syntax (name or not, arguments or not, block of instructions).
   • arguments (generic input values for functions) and parameters (actual values passed to functions).
   • "return" instruction.
   • variadic functions: quantity of arguments is variable.