This is a statement in Golang that checks whether the string variable “tt[i]” contains a hyphen (“-”).
The function “strings.Contains” takes two arguments, the first one being the string to be searched and the second one being the substring to be looked for. In this case, the substring is simply a hyphen.
If the hyphen is found in the string, the function returns “true”. Otherwise, it returns “false”.
This statement is often used to check if a particular character or substring exists within a larger string.




