Unexpected float behaviour in iPhone programming?

I am writing just these four lines in ViewDidLoad, and facing unexpected output,

    // Implement viewDidLoad to do additional setup after loading the view, typically from a nib.
- (void)viewDidLoad {
    [super viewDidLoad];


         float a = 15.264;
    NSLog(@"FLoat is %f",a);

        float b = 10/60;
    NSLog(@"FLoat is %f",b);
   }

In first float开发者_StackOverflow中文版 a is displaying correct value which is being assigned to a, but b is displaying 0.0000, why?

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If you want to declare float numbers, you should declare them with this format: x.xf. E.g float b = 10.0f/60.0f

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You are assigning the result of an integer division to a float, meaning, the result will be truncated before being assigned. In other words, 10/60, which would be 0.1666... yields the result 0, which is then assigned to b. So, b has the value zero.

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Since both operands are integer, the result of your division is an integer (0). If you want the float result of your division you should use

float b = 10.0/60.0

or even

float b = 10.0/60

because you need at least one of the operands to be float.

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try this,

float b = 10.0/60.0,

bcox, just 10/60 return int