Question

I have an expression from the strCal string strcal value is @”((24 – 18) / 87) * 100″
I want to have the result correct to 4 decimal so I retrieve the result using floatValue method

But instead of 6.8966 I get 0

This is my code

NSString *strCal=[NSString stringWithFormat:@"   
                      ((%d%@)%@)%@",number,strMinus,strDivide,strMultiple];
    NSExpression *exp=[NSExpression expressionWithFormat:strCal];
    float result=[[exp expressionValueWithObject:nil context:nil] floatValue];
    NSLog(@"result:%f",result);

result:0.000000

Answer 1

I found it myself by converting the 87 in the string strCal to float value like below

@”((24 – 18) / 87.00) * 100″

why because means the either the dividend or divisor has to be in float so that the compiler(LLVM) output the answer in float