Started 1-2

1-2/go.mod

@@ -0,0 +1,3 @@
+module git.home.dutchellie.nl/DutchEllie/adventofcode2021
+
+go 1.17

1-2/main.go

@@ -0,0 +1,45 @@
+package main
+
+import (
+	"bufio"
+	"fmt"
+	"os"
+	"strconv"
+)
+
+func main() {
+	input, err := readInput("input")
+	if err != nil {
+		fmt.Errorf(err.Error())
+		return
+	}
+
+	counter := 0
+	for i := 0; i < len(input)-1; i++ {
+		if input[i+1] > input[i] {
+			counter++
+		}
+	}
+
+	fmt.Printf("It increased %d times", counter)
+}
+
+func readInput(filename string) ([]int, error) {
+	file, err := os.Open(filename)
+	if err != nil {
+		return nil, err
+	}
+	defer file.Close()
+
+	numbers := make([]int, 0)
+	scanner := bufio.NewScanner(file)
+	for scanner.Scan() {
+		number, err := strconv.Atoi(scanner.Text())
+		if err != nil {
+			return nil, err
+		}
+		numbers = append(numbers, number)
+	}
+
+	return numbers, nil
+}