discrepancy in double to Float class conversion in java

Question

I am trying the below code but after executing 344741.79 value is showing as 344741.78

Means after decimal place .79 is getting converted to .78, I am really wondering why I am not getting the exactly same value after conversion and which logic is doing this?

public static void main(String[] s) {
 double a = 344741.79;
 System.out.print(new Float(a));
}

• gyre: You lose some precision when converting from a double to a float in Java.
• Thilo: And while that may or may not be the case here, you also lose precision during compilation when converting from that Java source code literal to double (which cannot represent all decimal fractions either).
• CocoNess: You should use the BigDecimal class if you require precision

Answer 1

Float is only guaranteed to accurately store 6 significant decimal digits. In the case of 344741.79, the 2 nearest Floats are 344741.78125 (which is printed as 344741.78) and 344741.8125 (which is printed as 344741.8).

• Priyanshu: Thank you for your answer and time :)
• Simon Byrne: If you're happy with the answer, please accept it by clicking the tick.