mySqrt - 5 seconds answer

mySqrt/mySqrt.go

@@ -0,0 +1,13 @@
+package main
+
+func mySqrt(x int) int {
+	count := 0
+	for {
+		if count*count > x {
+			count--
+			break
+		}
+		count++
+	}
+	return count
+}

mySqrt/mySqrt_test.go

@@ -0,0 +1,20 @@
+package main
+
+import "testing"
+
+func TestMySqrt(t *testing.T) {
+	t.Run("4", func(t *testing.T) {
+		got := mySqrt(4)
+		want := 2
+		if got != want {
+			t.Errorf("got %v, want %v", got, want)
+		}
+	})
+	t.Run("8", func(t *testing.T) {
+		got := mySqrt(8)
+		want := 2
+		if got != want {
+			t.Errorf("got %v, want %v", got, want)
+		}
+	})
+}