The strings.Contains function in Golang is used to check whether a given substring exists within a string. It returns true if the substring is found and false if it is not.
Key Points:
It takes two arguments: the main string and the substring to search for.
The function is case-sensitive, so the substring must match the exact case.
If the substring is empty, the function always returns true because an empty string is considered present in all strings.
For example, it can determine if a word exists in a sentence or if a specific sequence of characters appears in a text.