[golang] examples

week1.go

package main

import (
	"math"
	"fmt"
)

func main() {

	maxInt8 := math.MaxInt8
	minInt8 := math.MinInt8
	maxInt16 := math.MaxInt16
	minInt16 := math.MinInt16
	maxInt32 := math.MaxInt32
	minInt32 := math.MinInt32
	
	var maxInt64 int64
	maxInt64 = math.MaxInt64
	
	var minInt64 int64	
	minInt64 = math.MinInt64
	
	maxUint8 := math.MaxUint8
	maxUint16 := math.MaxUint16
	
	var maxUint32 uint32
	maxUint32 = math.MaxUint32
	
	var maxUint64 uint64
	maxUint64 = math.MaxUint64
	
	maxFloat32 := math.MaxFloat32
	maxFloat64 := math.MaxFloat64
	
	fmt.Println("Range of Int8 :: ", minInt8, " to ", maxInt8)
	fmt.Println("Range of Int16 :: ", minInt16, " to ", maxInt16)
	fmt.Println("Range of Int32 :: ", minInt32, " to ", maxInt32)
	fmt.Println("Range of Int64 :: ", minInt64, " to ", maxInt64)
	
	fmt.Println("Max Uint8 :: ", maxUint8)
	fmt.Println("Max Uint16 :: ", maxUint16)
	fmt.Println("Max Uint32 :: ", maxUint32)
	fmt.Println("Max Uint64 :: ", maxUint64)
	fmt.Println("Max Float32 :: ", maxFloat32)
	fmt.Println("Max Float64 :: ", maxFloat64)
	
	s := "hello, World!"
	r := []rune(s)
	r[0] = 'H'
	s2 := string(r)
	fmt.Println(s2)
	
	/*numbers := []int{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}
	sum := 0
	for i := 0; i < len(numbers); i++ {
		sum += numbers[i]
	}
	fmt.Println("Sum is :: ", sum)*/
	
	numbers := []int{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}
	sum := 0
	i := 0
	n := len(numbers)
	for {
		sum += numbers[i]
		i++
		if i >= n {
			break
		}
	}
	fmt.Println("Sum is :: ", sum)
	
	numbers := []int{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}
	sum := 0
	for index, val := range numbers {
		sum += val
		fmt.Print("[", index, ",", val, "] ")
	}
	fmt.Println("\nSum is :: ", sum)
	kvs := map[int]string{1: "apple", 2: "banana"}
	for k, v := range kvs {
		fmt.Println(k, " -> ", v)
	}
	str := "Hello, World!"
	for index, c := range str {
		fmt.Println("[", index, ",", string(c), "] ")
	}
	
	data := 10
	ptr := &data
	fmt.Println("Value stored at variable var is ", data)
	fmt.Println("Value stored at variable var is ", *ptr)
	fmt.Println("The address of variable var is ", &data)
	fmt.Println("The address of variable var is ", ptr)
	
	
}