Convert in every direction

Goal

Finish three small functions that each convert a value to a different type: Dollars turns a float64 into an int, Label turns an int into text, and Narrow squeezes an int64 into an int8.

Example

If you had a distance in kilometres and a count of steps, you would write:

var Km = 4.8
var Steps = 12

func Whole() int {
	return int(Km)
}

func Text() string {
	return strconv.Itoa(Steps)
}

int(Km) cuts off the decimals and gives 4. strconv.Itoa(Steps) gives the text "12". For this to compile, the file also needs import "strconv".

Rules

• Edit convert.go. Each function has a // TODO comment and a return line you will change.
• Dollars returns Price converted to an int. The decimals are cut off, not rounded, so 3.99 becomes 3.
• Label returns Number as text, using strconv.Itoa. Add import "strconv" at the top of the file.
• Narrow returns Big converted to an int8. A value too big for an int8 wraps around, so 300 becomes 44.
• The tests change Price, Number and Big, so use the variables. Do not type numbers into the functions.
• Do not change the three var lines or the first line of each function.
• Do not use string(Number): it gives a character, not the digits.

What you'll practice

Converting with int(...) and int8(...), turning a number into text with strconv.Itoa, and seeing what a conversion loses.

Run it

gonomicon fetch week-1/08-08-convert-between-types
cd 08-08-convert-between-types
gonomicon test
gonomicon submit

Hints

1. Each function needs one conversion: a float64 to an int, an int to text, and an int64 to an int8. The conversion goes around the variable name.
2. Dollars uses int( ... ) around Price. Narrow uses int8( ... ) around Big. Label cannot use a plain conversion, because turning a number into text needs strconv.Itoa.
3. return int(Price), then return strconv.Itoa(Number), then return int8(Big). Label needs import "strconv" at the top of the file.