Learn go basics

06-variables/04-assignment/exercises/01-make-it-blue/main.go

@@ -8,6 +8,8 @@
 
 package main
 
+import "fmt"
+
 // ---------------------------------------------------------
 // EXERCISE: Make It Blue
 //
@@ -20,11 +22,9 @@ package main
 // ---------------------------------------------------------
 
 func main() {
- // UNCOMMENT THE CODE BELOW:
-
- // color := "green"
 
- // ADD YOUR CODE BELOW:
+ color := "green"
 
- // ?
+ color = "blue"
+ fmt.Println(color)
 }

06-variables/04-assignment/exercises/02-vars-to-vars/main.go

@@ -8,6 +8,8 @@
 
 package main
 
+import "fmt"
+
 // ---------------------------------------------------------
 // EXERCISE: Variables To Variables
 //
@@ -36,15 +38,9 @@ package main
 // ---------------------------------------------------------
 
 func main() {
- // UNCOMMENT THE CODE BELOW:
-
- // color := "green"
-
- // ADD YOUR CODE BELOW
-
- // ?
+ color := "green"
 
- // UNCOMMENT THE CODE BELOW TO PRINT THE VARIABLE
+ color = "dark " + color
 
- // fmt.Println(color)
+ fmt.Println(color)
 }

06-variables/04-assignment/exercises/03-assign-with-expressions/main.go

@@ -34,7 +34,7 @@ func main() {
 
  // ADD YOUR CODE BELOW
 
- // ?
+ n = 3.14 * 2
 
  fmt.Println(n)
 }

06-variables/04-assignment/exercises/04-find-the-rectangle-perimeter/main.go

@@ -8,6 +8,8 @@
 
 package main
 
+import "fmt"
+
 // ---------------------------------------------------------
 // EXERCISE: Find the Rectangle's Perimeter
 //
@@ -33,12 +35,15 @@ package main
 func main() {
  // UNCOMMENT THE CODE BELOW:
 
- // var (
- //  perimeter  int
- //  width, height = 5, 6
- // )
+ var (
+ perimeter int
+ width, height = 5, 6
+ )
 
  // USE THE VARIABLES ABOVE WHEN CALCULATING YOUR RESULT
 
+ perimeter = (width + height) * 2
+
  // ADD YOUR CODE BELOW
+ fmt.Println(perimeter)
 }

06-variables/04-assignment/exercises/05-multi-assign/main.go

@@ -30,7 +30,7 @@ func main() {
  version int
  )
 
- // ADD YOUR CODE BELOW
+ lang, version = "go", 2
 
  // DO NOT TOUCH THIS
  fmt.Println(lang, "version", version)

06-variables/04-assignment/exercises/06-multi-assign-2/main.go

@@ -8,6 +8,8 @@
 
 package main
 
+import "fmt"
+
 // ---------------------------------------------------------
 // EXERCISE: Multi Assign #2
 //
@@ -28,11 +30,16 @@ package main
 func main() {
  // UNCOMMENT THE CODE BELOW:
 
- // var (
- //  planet string
- //  isTrue bool
- //  temp float64
- // )
+ var (
+ planet string
+ isTrue bool
+ temp float64
+ )
 
  // ADD YOUR CODE BELOW
+ planet, isTrue, temp = "Mars", true, 19.5
+
+ fmt.Println("Air is good on", planet)
+ fmt.Println("It's", isTrue)
+ fmt.Println("It is", temp, "degrees")
 }

06-variables/04-assignment/exercises/07-multi-short-func/main.go

@@ -8,6 +8,8 @@
 
 package main
 
+import "fmt"
+
 // ---------------------------------------------------------
 // EXERCISE: Multi Short Func
 //
@@ -29,11 +31,11 @@ package main
 
 func main() {
  // ADD YOUR DECLARATIONS HERE
- //
+ _, b := multi()
 
  // THEN UNCOMMENT THE CODE BELOW
 
- // fmt.Println(b)
+ fmt.Println(b)
 }
 
 // multi is a function that returns multiple int values

06-variables/04-assignment/exercises/08-swapper/main.go

@@ -8,6 +8,8 @@
 
 package main
 
+import "fmt"
+
 // ---------------------------------------------------------
 // EXERCISE: Swapper
 //
@@ -25,7 +27,9 @@ package main
 func main() {
  // UNCOMMENT THE CODE BELOW:
 
- // color, color2 := "red", "blue"
+ color, color2 := "red", "blue"
+
+ color, color2 = "orange", "green"
 
- // ?
+ fmt.Println(color, color2)
 }

06-variables/04-assignment/exercises/09-swapper-2/main.go

@@ -8,6 +8,8 @@
 
 package main
 
+import "fmt"
+
 // ---------------------------------------------------------
 // EXERCISE: Swapper #2
 //
@@ -22,6 +24,7 @@ package main
 func main() {
  // UNCOMMENT THE CODE BELOW:
 
- // red, blue := "red", "blue"
- // ?
+ red, blue := "red", "blue"
+ red, blue = blue, red
+ fmt.Println(red, blue)
 }

06-variables/04-assignment/exercises/10-discard-the-file/main.go

@@ -8,6 +8,11 @@
 
 package main
 
+import (
+ "fmt"
+ "path"
+)
+
 // ---------------------------------------------------------
 // EXERCISE: Discard The File
 //
@@ -25,5 +30,7 @@ package main
 func main() {
  // UNCOMMENT THE CODE BELOW:
 
- // ? ?= path.Split("secret/file.txt")
+ dir, _ := path.Split("secret/file.txt")
+
+ fmt.Println(dir)
 }

06-variables/05-type-conversion/exercises/01-convert-and-fix/main.go

@@ -8,6 +8,8 @@
 
 package main
 
+import "fmt"
+
 // ---------------------------------------------------------
 // EXERCISE: Convert and Fix
 //
@@ -18,6 +20,6 @@ package main
 // ---------------------------------------------------------
 
 func main() {
- // a, b := 10, 5.5
- // fmt.Println(a + b)
+ a, b := 10, 5.5
+ fmt.Println(float64(a) + b)
 }

06-variables/05-type-conversion/exercises/02-convert-and-fix-2/main.go

@@ -8,6 +8,8 @@
 
 package main
 
+import "fmt"
+
 // ---------------------------------------------------------
 // EXERCISE: Convert and Fix #2
 //
@@ -18,7 +20,7 @@ package main
 // ---------------------------------------------------------
 
 func main() {
- // a, b := 10, 5.5
- // a = b
- // fmt.Println(a + b)
+ a, b := 10, 5.5
+ a = int(b)
+ fmt.Println(float64(a) + b)
 }

06-variables/05-type-conversion/exercises/03-convert-and-fix-3/main.go

@@ -8,6 +8,8 @@
 
 package main
 
+import "fmt"
+
 // ---------------------------------------------------------
 // EXERCISE: Convert and Fix #3
 //
@@ -18,5 +20,5 @@ package main
 // ---------------------------------------------------------
 
 func main() {
- // fmt.Println(int(5.5))
+ fmt.Println(5.5)
 }

06-variables/05-type-conversion/exercises/04-convert-and-fix-4/main.go

@@ -8,6 +8,8 @@
 
 package main
 
+import "fmt"
+
 // ---------------------------------------------------------
 // EXERCISE: Convert and Fix #4
 //
@@ -18,6 +20,6 @@ package main
 // ---------------------------------------------------------
 
 func main() {
- // age := 2
- // fmt.Println(int(7.5) + int(age))
+ age := 2
+ fmt.Println(7.5 + float64(age))
 }

06-variables/05-type-conversion/exercises/05-convert-and-fix-5/main.go

@@ -29,5 +29,5 @@ func main() {
  max := int16(1000)
 
  // FIX THE CODE HERE
- fmt.Println(int8(max) + min)
+ fmt.Println(max + int16(min))
 }

06-variables/06-project-greeter/exercises/01-count-arguments/main.go

@@ -8,6 +8,11 @@
 
 package main
 
+import (
+ "fmt"
+ "os"
+)
+
 // ---------------------------------------------------------
 // EXERCISE: Count the Arguments
 //
@@ -22,8 +27,8 @@ package main
 
 func main() {
  // UNCOMMENT & FIX THIS CODE
- // count := ?
+ count := len(os.Args) - 1
 
  // UNCOMMENT IT & THEN DO NOT TOUCH THIS CODE
- // fmt.Printf("There are %d names.\n", count)
+ fmt.Printf("There are %d names.\n", count)
 }

06-variables/06-project-greeter/exercises/02-print-the-path/main.go

@@ -8,6 +8,11 @@
 
 package main
 
+import (
+ "fmt"
+ "os"
+)
+
 // ---------------------------------------------------------
 // EXERCISE: Print the Path
 //
@@ -23,4 +28,5 @@ package main
 // ---------------------------------------------------------
 
 func main() {
+ fmt.Println(os.Args[0])
 }

06-variables/06-project-greeter/exercises/03-print-your-name/main.go

@@ -8,6 +8,11 @@
 
 package main
 
+import (
+ "fmt"
+ "os"
+)
+
 // ---------------------------------------------------------
 // EXERCISE: Print Your Name
 //
@@ -32,6 +37,6 @@ package main
 // ---------------------------------------------------------
 
 func main() {
- // get your name from the command-line
- // and print it
+ fmt.Println("Hi", os.Args[1])
+ fmt.Println("How are you?")
 }

06-variables/06-project-greeter/exercises/04-greet-more-people/main.go

@@ -8,6 +8,11 @@
 
 package main
 
+import (
+ "fmt"
+ "os"
+)
+
 // ---------------------------------------------------------
 // EXERCISE: Greet More People
 //
@@ -28,9 +33,15 @@ package main
 // ---------------------------------------------------------
 
 func main() {
- // TYPE YOUR CODE HERE
-
- // BONUS #1:
- // Observe the error if you pass less then 3 arguments.
- // Search on the web how to solve that.
+ var (
+ l = len(os.Args) - 1
+ n1 = os.Args[1]
+ n2 = os.Args[2]
+ n3 = os.Args[3]
+ )
+ fmt.Println("There are", l, "people!")
+ fmt.Println("Hello great", n1)
+ fmt.Println("Hello great", n2)
+ fmt.Println("Hello great", n3)
+ fmt.Print("Nice to meet you all.")
 }