go in the map, such as a dictionary in python

main FUNC () {
     // Go of k, v value pairs
     // key sub-map, the statement 

    var A = Map [ int ] String { . 1 : " WO " , 2 : " WAAS " } 
    
    // because more storage type multi uncertainty value returned is 0, or nil, or other null value, then it is ok that can represent values T or F, such a simple determination 
    
    IF V, ok: a = [ 10 ]; ok { 
        fmt.Println ( " has a value " , V) 
    } the else { 
        fmt.Println ( " the value is null " ) 
    } 
    
    
    // cycle value
     //Here is a direct access to the value of k and v, and the map is disordered 
    for k, V: = Range {a 
        fmt.Println (k) 
        fmt.Println (V) 
    } 
}