When the number n is halfway between two successive whole numbers (such as 1.5, 2.5, 3.5, and 4.5), the round function rounds it to the nearest even number. For instance, round(2.5) is 2 and round(3.5) is 4.

IDLE color codes the different types of elements. For instance, normal text is displayed in black and built- in functions (such as print, abs, int, and round) are displayed in purple.