Objective-C and Variable รู้จักกับตัวแปรในภาษา Objective-C (iOS,iPhone,iPad)

int totalPrice;
totalPrice = 123;

float numFloat = 1234.567;
double numDouble = 1.23456789;

BOOL boolOne = YES ; 
_Bool boolTwo = 0;

NSString *myString = @"This is my string";

    NSString *myString = @"This is my string";
    NSLog (@ "Hello %@ " , myString);

    int a = 123;
    int b = 456;
    int c = a + b;
    
    NSLog (@ "Total %d + %d = %d " , a,b,c);

    NSLog (@"%@", @"This is a constant character string object");
    
    int len = [@"Hello" length];
    NSLog (@"Length of string = %i", len);
    
    NSString *myString = @"This is my string";
    NSLog (@"Length of string = %i" , [myString length]);

    NSString *string1 = @"Weerachai Nukitram";
    NSMutableString *string2;
	string2 = [NSString stringWithFormat:@"Hello %@",string1];
    
    NSLog (@"%@" , string2);