Name badge

A conference prints a badge for everyone who arrives. The badge software hands your function a name and expects one line of greeting back, in exactly the same shape every time.

Write greeting, which takes a piece of text called name and returns the word Hello, a comma, a space, the name, and a full stop.

Worked example

Input:  name = "Ada"
Output: "Hello, Ada."

Input:  name = "Grace Hopper"
Output: "Hello, Grace Hopper."

Constraints

• name is between 0 and 40 characters long.
• Use the name exactly as it arrives. Do not change the capitalisation and do not trim anything off the ends.
• If the name is empty, return "Hello, ." anyway. The shape of the badge does not change.