Golang determining prefix suffix, inclusion relationship

4.7.1 Prefixes and suffixes
Hasprefix determines whether the string s begins with prefix:
strings.HasPrefix(s, prefix string) bool
Hassuffix determines whether the string s ends with suffix:
strings.HasSuffix(s, suffix string) bool

package mainimport ("fmt""strings")func main() {var str string = "This is an example of a string"fmt.Printf("T/F? Does the string \"%s\" have prefix %s? ", str, "Th")fmt.Printf("%t\n", strings.HasPrefix(str, "Th"))}

Output:

T/F? Does the string "This is an example of a string" have prefix Th? true

This example also demonstrates the use of the escape character \ and the formatted string.

String Containment Relationships
Contains determines whether the string s contains substr:
strings.Contains(s, substr string) bool