round( code example

Example 1: how to use math.round

//There are meny ways of rounding...
Math.floor(5.5) //Answer 5, it alwas rounds down.
Math.round(5.5) //Answer 6, it simpily rounds to the closest whole number.
Math.ceil(5.5) //Answer 6, it alwas rounds up.

//You can do more things too...
Math.floor(5.57 * 10) / 10 //Answer 5.5, the number turns into 55.7, Then gets floored (55.0), Then gets divied, (5.5)

Example 2: Explain the ROUND () function and its Syntax

SELECT ROUND(125.315, 2);
Result: 125.320    (result is rounded because 3rd parameter is omitted)

SELECT ROUND(125.315, 2, 0);
Result: 125.320    (result is rounded because 3rd parameter is 0)

SELECT ROUND(125.315, 2, 1);
Result: 125.310    (result is truncated because 3rd parameter is non-zero)

SELECT ROUND(125.315, 1);
Result: 125.300    (result is rounded because 3rd parameter is omitted)

SELECT ROUND(125.315, 0);
Result: 125.000    (result is rounded because 3rd parameter is omitted)

SELECT ROUND(125.315, -1);
Result: 130.000    (result is rounded because 3rd parameter is omitted)

SELECT ROUND(125.315, -2);
Result: 100.000    (result is rounded because 3rd parameter is omitted)