#import <Foundation/Foundation.h>

int main(int argc, const char * argv[])
{

    @autoreleasepool {
        
        // insert code here...
        NSLog(@"Hello, World!");
        
        // Print out something
        NSLog(@"This is a testing");
        
        NSLog(@"THIS IS ANOTHER TESTING");
        
        int k1 = 100;
        
        int k2 = 200;
        
        int sum = k1 + k2;
        
        NSLog(@"The sum is %i",sum);
        
        float k3 = 400;
        float k4 = 500;
        
        NSLog(@"The sum is %3.2f",k3+k4);
        
        // For Loop
        
        for (int i=0; i<5; i++) {
            
            NSLog(@"The number is %i",i);
            
            if(i == 2) {
                
                NSLog(@"Matching number 2");
            }
            
        }
        
        // While Loop
        
        int j = 0;
        
        while (j<5) {
            
            NSLog(@"The num is %i",j);
            
            j++;
        }
        
        
        // Normal Variable
        // Normal variable contains the actual value
        
        int myvar = 10;
        
        // Pointer Variable
        // Pointer variable contains the memory address of the variable
        
        // Define a pointer variable without value.
        int *myptr;
        
        // Store the address of "myvar" variable into "myptr" variable
        myptr = &myvar;
        
        // Print out the content of myvar, which is the actual value
        NSLog(@"myvar is %i",myvar);
        
        // Print out the content of myptr, which is the address of myvar
        NSLog(@"myptr is %d",myptr);
        
        // Get the content contained in the address and then add 30 to it and save back
        *myptr = *myptr + 30;
        
        NSLog(@"myvar is %i",myvar);
        
        // NSString
        
        NSString *myname = [[NSString alloc]initWithFormat:@"Peter Wong"];
        
        NSLog(@"My name is %@",myname);
        
        
        
        
        
        
        
        
        
    }
    return 0;
}