I'd like to round integers down to their nearest 1000 in Java.
So for example:
- 13,623 rounds to 13,000
- 18,999 rounds to 18,000
- etc
views:
286answers:
2
+19
A:
Simply divide by 1000 to lose the digits that are not interesting to you, and multiply by 1000:
i = i/1000 * 1000
Or, you can also try:
i = i - (i % 1000)
abyx
2009-11-23 14:39:14
+1: I never thought to use modulus this way. Also, you can shorten the line slightly by doing `i -= i % 1000` (dunno if parentheses are required around the right side or not)
R. Bemrose
2009-11-23 14:45:08
Really? I always thought of modulus as a way to get the units of a number (`i % 10`) etc. Regarding the shortened version - that's probably what I'd do in my code, but wanted it to be clear here.
abyx
2009-11-23 14:47:14
This rounds towards zero.
starblue
2009-11-23 14:53:01
+3
A:
You could divide the number by 1000, apply Math.floor, multiply by 1000 and cast back to integer.
Poindexter
2009-11-23 14:42:33