Basic Types

Go's basic variable types are:

bool

string

int  int8  int16  int32  int64
uint uint8 uint16 uint32 uint64 uintptr

byte // alias for uint8

rune // alias for int32
     // represents a Unicode code point

float32 float64

complex64 complex128

We talked about strings and ints previously, and those two types should be fairly self-explanatory. A bool is a boolean variable, meaning it has a value of true or false. The floating point types (float32 and float64) are used for numbers that are not integers -- that is, they have digits to the right of the decimal place, such as 3.14159. The float32 type uses 32 bits of precision, while the float64 type uses 64 bits to be able to more precisely store more digits. Don't worry too much about the intricacies of the other types for now. We will cover some of them in more detail as the course progresses.

Declaring a variable

Variables are declared using the var keyword. For example, to declare a variable called number of type int, you would write:

var number int

To declare a variable called pi to be of type float64 with a value of 3.14159, you would write:

var pi float64 = 3.14159

The value of an initialized variable with no assignment will be its zero value.

Initialize some variables

Initialize the given variables to int, float64, bool and string respectively, with their zero values.