How do I round a number down to the closest 10000 in Flutter?

Question

How do I round down number 10999 to 10000?

Solution

You can use the following code:

int x = 10999;
int divisor = 10000; 
int result = (x / divisor).floor() * divisor;

Or using integer divisoin:

int x = 10999;
int divisor = 10000; 
int result = (x ~/ divisor) * divisor;

Comments

[jamesdlin]

Note that the floor() approach will round toward negative infinity and the integer division approach will round toward zero. That won't matter for 10999, but it would matter if rounding negative numbers.