// The Join() method inserts separator between each element and concatenates all the elements,
// resulting in single output string.
The Join() method inserts separator between each element and concatenates all the elements,
resulting in single output string.
// The Join () method inserts separator between each element and concatenates all the elements // resulting in single output string .
func (S Str) Join(separator string) (r string) {
	r = S[0]
	for _, v := range S[1:] {
		r = Concat(r, separator, v)
	}
	return r
}
func ( S Str ) Join ( separator string ) ( r string ) { r = S [ 0 ] for _ , v := range S [ 1 : ] { r = Concat ( r , separator , v ) } return r }
The Join() method inserts separator between each element and concatenates all the elements,
resulting in single output string.
The Join () method inserts separator between each element and concatenates all the elements resulting in single output string .