Go编程基础-基础篇 2

package main

import (
	"fmt"
	"math"
)

func main() {
	var num int
	num = math.MaxInt64
	fmt.Println(num)
}

9223372036854775807

package main

import (
	"fmt"
	"math"
)

func main() {
	var a int8 = math.MaxInt8
	var b int16 = math.MaxInt8 + 1
	fmt.Println(a, b)

	a = int8(b)
	fmt.Println(a, b)

	a = a + 1
	b = b + 1
	fmt.Println(a, b)

	c := int16(a) + b
	fmt.Println(c)
}

127 128
-128 128
-127 129
2