This function has no return value.

这个函数没有返回值。

youdao

There is no return value to enter; in some upcoming steps we'll tell you how to trigger the next state change.

没有要输入的返回值；在一些后续步骤中，我将会告诉您如何触发下一状态变化。

youdao

And so while you needed expressions for math to work, there was no point in making anything else return a value, because there could not be anything waiting for it.

所以，如果你需要用数学式子计算一个值，那就只有用表达式返回这个值，没有其他语法结构可用，因为否则就无法处理这个值。

youdao

But for now they see little or no financial return from their current smartphone map apps beyond the value added to their brands.

BBC: Google Map Maker edit tools extended to cover the UK