go Language: Type Conversion

Type conversion for converting one type to another type of variable variable.

The following scene:

package main

import "fmt"

func main() {
	var sum int = 17
	var count int = 5

	mean := sum / count
	fmt.Printf("mean 的值为: %f\n", mean)
}

Output: mean value:!% F (int = 3)

The above code, the variables sum and count are integers, for division by two variables, because not divisible, it should be a floating point number, but the resulting 3 is an integer, so there need to use a type conversion, first the sum and count variable into float32 type, and then make the division, get what we want accurate float up. code show as below:

package main

import "fmt"

func main() {
	var sum int = 17
	var count int = 5

	mean := float32(sum) / float32(count)
	fmt.Printf("mean 的值为: %f\n", mean)
}

Output: mean value: 3.400000