Variable dictionaries and immutable dictionaries in OC

#import <foundation/foundation.h>int Main (int argc, const char * argv[]) {    //non-changing dictionary, cannot be changed after creation        Nsdictionary * dic = [[Nsdictionary alloc]initwithobjectsandkeys:@ "Jack", @ "name", @ "@", @ "age", nil];    NSLog (@ "%@", dic);    Nsdictionary * Dic1 = @{@ "name": @ "Jack" @ "age": @ "@"};    NSLog (@ "Dic1%@", dic1);        NSNumber * num = [nsnumber numberwithint:10];    Nsarray * array = @[@ "One", @ "one", @ "three"];    Nsdictionary * Dic2 = @{@ "array": Array,                            @ "num": num,                            @ "dic":d ic                            };}

#import <foundation/foundation.h>int Main (int argc, const char * argv[]) {    nsmutabledictionary * dic =    [[ Nsmutabledictionary alloc]     initwithobjectsandkeys:@ "Tom" @ "name" @ "@" @ "age", nil];}

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Variable dictionaries and immutable dictionaries in OC