Iteration done

learn_go_with_tests/iteration/go.mod

@@ -0,0 +1,3 @@
+module iteration
+
+go 1.21.0

learn_go_with_tests/iteration/repeat.go

@@ -0,0 +1,12 @@
+package iteration
+
+func Repeat(charaters string, count int) string {
+	var repeated string
+
+	for i := 0; i < count; i++ {
+		repeated += charaters
+	}
+
+	return repeated
+
+}

learn_go_with_tests/iteration/repeat_test.go

@@ -0,0 +1,41 @@
+package iteration
+
+import (
+	"fmt"
+	"testing"
+)
+
+func TestRepeat(t *testing.T) {
+
+	t.Run("repeat simple letters", func(t *testing.T) {
+		repeated := Repeat("a", 6)
+		expected := "aaaaaa"
+
+		if repeated != expected {
+			t.Errorf("expected %q but got %q", expected, repeated)
+		}
+	})
+
+	t.Run("repeat words letters", func(t *testing.T) {
+		repeated := Repeat("dog", 5)
+		expected := "dogdogdogdogdog"
+
+		if repeated != expected {
+			t.Errorf("expected %q but got %q", expected, repeated)
+		}
+	})
+}
+
+// This test demonstrates benchmark testing https://pkg.go.dev/testing#hdr-Benchmarks
+
+func BenchmarkRepeat(b *testing.B) {
+	for i := 0; i < b.N; i++ {
+		Repeat("a", 4)
+	}
+}
+
+func ExampleRepeat() {
+	repeated := Repeat("da", 5)
+	fmt.Println(repeated)
+	// Output: dadadadada
+}