158 lines
2.4 KiB
Go
158 lines
2.4 KiB
Go
/*
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Coding Exercise #1
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Using the const keyword declare and initialize the following constants:
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1. daysWeek with value 7
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2. lightSpeed with value 299792458
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3. pi with value 3.14159
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Run the program without errors.
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package main
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func main() {
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const daysWeek = 7
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const lightSpeed = 299792458
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const pi = 3.14159
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}
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*/
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/*
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Coding Exercise #2
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Change the code from the previous exercise and declare all 3 constants as grouped constants.
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Make them untyped.
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func main() {
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const (
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daysWeek = 7
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lightSpeed = 299792458
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pi = 3.14159
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)
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}
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*/
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/*
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Coding Exercise #3
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Calculate how many seconds are in a year.
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STEPS:
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1. Declare secPerDay constant and initialize it to the number of seconds in a day
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2. Declare daysYear constant and initialize it to 365
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3. Use fmt.Printf() to print out the total number of seconds in a year.
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EXPECTED OUTPUT:
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There are 31536000 seconds in a year.
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package main
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import "fmt"
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func main() {
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const (
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daysYear = 365
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hoursDay = 24
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secondsHour = 3600
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)
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var result = daysYear * hoursDay * secondsHour
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fmt.Printf("Seconds in a Year %d\n", result)
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}
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*/
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/*
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Coding Exercise #4
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There are an error in the following Go program. Try to identify the error, change the code and run the program without errors.
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package main
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func main() {
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const x int = 10
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// declaring a constant of type slice int ([]int)
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const m = []int{1: 3, 4: 5, 6: 8}
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_ = m
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}
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package main
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func main() {
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const x int = 10
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// declaring a constant of type slice int ([]int)
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// const m = []int{1: 3, 4: 5, 6: 8}
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// You cannot declare a slice constant
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// _ = m
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}
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*/
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/*
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Coding Exercise #5
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There are some errors in the following Go program. Try to identify the errors, change the code and run the program without errors.
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package main
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import "math"
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func main() {
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const a int = 7
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const b float64 = 5.6
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const c = a * b
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x := 8
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const xc int = x
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const noIPv6 = math.Pow(2, 128)
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}
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package main
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// import "math"
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func main() {
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const a int = 7
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const b float64 = 5.6
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const c = float64(a) * b
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x := 8
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_ = x
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// const xc int = x
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// const noIPv6 = math.Pow(2, 128)
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}
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*/
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/*
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Coding Exercise #6
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Using Iota declare the following months of the year: Jun, Jul and Aug
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Jun, Jul and Aug are constant and their value is 6, 7 and 8.
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*/
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package main
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import "fmt"
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func main() {
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const (
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Jun = iota + 6
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Jul
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Aug
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)
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fmt.Println(Jun, Jul, Aug)
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}
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