Though, I checked the meaning of "alike" on online dictionaries, I could not understand the exact meaning which is in line with the following sentence. Therefore, I would really appreciate it if someone could let me know what is the meaning of "alike" in the following sentence.
Restricting cigarette use is beneficial to the health of smokers and non-smokers alike.
q=alike adv . In the same manner or to the same degree: They dress and walk alike.
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https://www.ahdictionary.com/word/search.html?q=alike
adv.
In the same manner or to the same degree: They dress and walk alike.
dileepaRestricting cigarette use is beneficial to the health of smokers and non-smokers alike.
= ... to the health of both smokers and non-smokers.
You can rephrase each of the following by using 'both' instead of 'alike'.
The sullen haze hung over the earth and sky alike.
The game was a treat for new fans and old fans alik