needless to say

Needless to say is a common idiom which is another way of saying that obviously this thing can happen or be true. When someone said needless to say, they mean to tell you obviously, or for sure this has to be right. This may be in reference to bringing up a resolution to a problem you are going through, or in response to what someone tells you and when you mean to say it can definitely or obviously be true, you can say needless to say.