Today’s knowelege is quite simple:

Key Concepts

variable

1. Use var to declare a variable

2. use

   var a int = 30

   to declear a as a integer type, or just use := like:

   a := 100

   to let Go infer the type automatically

Data Type

basic data types:

• int

• float64

• string

• bool

Cli Input

• use fmt.Scan() to get user input

• the parameter should be a pointer, so use & in front of the varibale

Print Formatting

use fmt.Printf() to format output, common format verbs:

• %s -> string

• %d -> integer

• %f -> float

• %v -> any type(generic)