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iOS Objective-C Basics (Retired) Foundation Framework NSNumber

Ocky Wiemeijer
Ocky Wiemeijer
5,451 Points
Posted by Ocky Wiemeijer
Ocky Wiemeijer
5,451 Points

What am I doing wrong?

The challenge is to declare another variable named planck and assign it the value of 6.626.

What is wrong about my code? It won't accept it, saying 'Make sure to assign the right value to planck'

nsnumber.mm 
NSNumber *foxtrot = [[NSNumber alloc] initWithInt:24];
NSLog(@"foxtrot %@", foxtrot);
NSNumber *planck = [[NSNumber alloc] initWithFloat:6.626];

2 Answers

Steve Hunter
Steve Hunter
57,712 Points

Hi there,

I adopted a different approach using literals:

NSNumber *foxtrot = @24;
NSLog(@"foxtrot %@", foxtrot);
NSNumber *planck = @6.626;
NSLog(@"planck %@", planck);

This is passing the challenge.

Steve.

Gabe Nadel
seal-mask
.a{fill-rule:evenodd;}techdegree
Gabe Nadel
Treehouse Guest Teacher
Gabe Nadel
.a{fill-rule:evenodd;}techdegree
Gabe Nadel
Treehouse Guest Teacher

Yes, the first step in the code challenge says explicitly, "using literal notation". The third step doesn't mention that. I'll be updating the quiz question to reflect that.

Thanks for helping to improve the Treehouse experience!

By the way, if you'd like a great summary of different literals in Obj-C:

https://www.codementor.io/ios/tutorial/introduction-to-objective-c-literals-for-ios-beginners