01-FP-Basics

Basic Expressions

Standard Out

print_endline "Hello World!";;

For other data type,print_char,print_float,print_int, etc.

Declaration

• let is used for declarations.

let <name> = <expression>;;

• let - initiative a declaration.
• <name> - a new name (for variable, functions, etc.) being declared, which must start with lower letter;
• <expression> - the value of the name.

Example:

let x = 4005;;

Return:

val x : int = 4005