How to calculate number of digits after floating point in iOS?

Question

How can I calculate the number of digits after the floating point in iOS?

For example:

• 3.105 should return 3
• 3.0 should return 0
• 2.2 should return 1

Update: Also we need to add the following example. As I want to know number of digits in the fraction part.

• 1e-1 should return 1

Answer 1

Try this way:

NSString *enteredValue=@"99.1234";

NSArray *array=[enteredValue componentsSeparatedByString:@"."];
NSLog(@"->Count : %ld",[array[1] length]);