Feature/example test (#24)

example docs

floatUtil/float_x_to_x_example_test.go

@@ -0,0 +1,43 @@
+package floatUtil
+
+import "fmt"
+
+func ExampleFloat32ToStr() {
+	var f float32 = 3.1
+	res := Float32ToStr(f)
+
+	fmt.Println(res)
+
+	// Output:
+	// 3.1
+}
+
+func ExampleFloat32ToFloat64() {
+	var f float32 = 3.1
+	res := Float32ToFloat64(f)
+
+	fmt.Println(res)
+
+	// Output:
+	// 3.1
+}
+
+func ExampleFloat64ToStr() {
+	f := 3.14
+	res := Float64ToStr(f)
+
+	fmt.Println(res)
+
+	// Output:
+	// 3.14
+}
+
+func ExampleFloat64ToFloat32() {
+	f := 3.14
+	res := Float64ToFloat32(f)
+
+	fmt.Println(res)
+
+	// Output:
+	// 3.14
+}