Why Does Integer Division in Java Produce Truncated Results?

Integer Division Pitfall in Java: Understanding and Resolving Erroneous Results

When performing integer division in Java, a common error arises wherein the fractional part of the result is discarded, leading to unexpected outcomes. This issue stems from the fact that integer division, in its default form, treats both the operands as integers.

For example, consider the following Java code:

float res = quantity / standard;

If quantity and standard are integers, the division operation will perform integer division, resulting in a truncated value. This occurs because there is no fractional part in an integer quotient.

To resolve this issue, one must explicitly convert the numerator or denominator to a floating-point type. By doing so, the division operation will be forced to perform floating-point division, which retains the fractional part of the result.

One approach is to cast the numerator to a float, as shown below:

float res = (float) quantity / standard;

Alternatively, if working with literals, you can ensure proper float conversion by adding the "f" suffix to the denominator, as seen below:

float f = 6800f / 500;

These methods ensure that the division operation is performed as a floating-point operation, preserving the fractional part and eliminating the truncation error encountered with integer division.

The above is the detailed content of Why Does Integer Division in Java Produce Truncated Results?. For more information, please follow other related articles on the PHP Chinese website!