Why Does Integer Division in Java Produce Unexpected Results?

Integer Division: Understanding the Unexpected Behavior

In Java, integer division performs division between two integer values, discarding the fractional part of the result. This behavior can lead to unexpected outcomes, as demonstrated in the following code:

int quantity = 6800;
int standard = 500;
float res = quantity / standard;

Expected Result: 13.6

Actual Result: 13.0

One explanation for this discrepancy lies in the integer division being performed. Integer division truncates the result, resulting in the loss of the fractional part. To obtain the correct result, we need to force the division to be treated as a floating-point division.

This can be achieved by casting the numerator to float explicitly:

float res = (float) quantity / standard;

Alternatively, if dealing with literals, we can append the 'f' suffix to the denominator to indicate a float:

float res = 6800f / 500;

By using float-division, we prevent integer division and preserve the fractional part of the result. This approach will consistently yield the expected result: 13.6.

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