Learning Functional Programming in Go

Type systems

What comes to mind when we see the word type? Data type? Like integer, string, date, or a composite type (struct in Go) that can contain multiple fields of various data types..

What are they good for? When we compile our program, strongly typed language compilers can catch errors that might cause runtime errors or possibly worse, incorrect results that don't crash the program. For example, JavaScript uses type coercion to dynamically change data types of variables during runtime. The statement MyBalance + 100.00 will equal MyBalance100.00, which might not be what we really want and may cause problems that are caught by online bank customers that complain that their balances don't add up. Weakly typed languages such as JavaScript ...