Objective-c convert Long and float to String

Question

I need to convert two numbers to string in Objective-C.

One is a long number and the other is a float.

I searched on the internet for a solution and everyone

Answer 1

floatValue has to be a double. At least this compiles correctly and does what is expected on my machine Floats can only store about 8 decimal digits and your number 12345678.1234 requires more precision than that, hence only about the 8 most significant digit are stored in a float.

double floatValue = 12345678.1234;
NSString *myString = [NSString stringWithFormat: @"%f", floatValue];

results in

2011-11-04 11:40:26.295 Test basic command line[7886:130b] floatValue = 12345678.123400