For more control over output, use fmt.Printf. It uses format verbs to insert values into a string. The verb %s inserts a string, %d inserts an integer, and %v inserts any value:
name := "Alice"
age := 30
fmt.Printf("Name: %s, Age: %d\n", name, age)
Notice that Printf doesn't add a newline automatically. You need to include \n yourself.