Section9-ex2

Section8/74.go

@@ -0,0 +1,30 @@
+package main
+
+import "fmt"
+
+func main() {
+	grades := [3]int{
+		1: 30,
+		0: 5,
+		2: 7,
+	}
+	fmt.Println(grades)
+
+	accounts := [3]int{2: 50}
+	fmt.Println(accounts)
+
+	names := [...]string{
+		5: "Dan",
+	}
+	fmt.Println(names, len(names))
+
+	cities := [...]string{
+		5:        "Paris",
+		"London", //index 6
+		1:        "NYC",
+	}
+	fmt.Printf("%#v\n", cities)
+
+	weekend := [7]bool{5: true, 6: true}
+	fmt.Println(weekend)
+}

Section9/76-1.go

@@ -0,0 +1,47 @@
+/*
+Coding Exercise #1
+
+1. Using the var keyword, declare an array called cities with 2 elements of
+type string. Don't initialize the array.
+
+Print out the cities array and notice the value of its elements.
+
+2. Declare an array called grades of type [3]float64 and initialize only
+the first 2 elements using an array literal.
+
+Print out the grades array and notice the value of its elements.
+
+3. Declare an array called taskDone using the ellipsis operator.
+The elements are of type bool. Print out taskDone.
+
+4. Iterate over the array called cities using the classical for loop syntax and the len function and print out element by element.
+
+5. Iterate over grades using the range keyword and print out element
+by element.
+*/
+package main
+
+import "fmt"
+
+func main() {
+	var cities [2]string
+	fmt.Printf("%#v\n", cities)
+
+	grades := [3]float64{
+		0: 1.6,
+		1: 2.0,
+	}
+	fmt.Printf("%#v\n", grades)
+
+	taskDone := [...]bool{}
+	fmt.Printf("%#v\n", taskDone)
+
+	for i := 0; i < len(cities); i++ {
+		fmt.Println("index:", i, " value:", cities[i])
+	}
+
+	for i, v := range grades {
+		fmt.Println("index:", i, " value:", v)
+	}
+
+}

Section9/76-2.go

@@ -0,0 +1,21 @@
+/*
+Coding Exercise #2
+
+Consider the following array declaration:
+nums := [...]int{30, -1, -6, 90, -6}
+
+Write a Go program that counts the number of positive even numbers
+in the array.
+*/
+
+package main
+
+func main() {
+	nums := [...]int{30, -1, -6, 90, -6}
+
+	for i := 0; i < len(nums); i++ {
+		if i > 0 && i%2 {
+
+		}
+	}
+}