ELI5: Explain Like I'm 5

IBM hexadecimal floating point

Okay, so imagine you have a big box of Legos. Each Lego is like a number, and you can stack them together in different ways to make bigger numbers. But sometimes, you want to use really, really big numbers or really, really tiny numbers, and it gets hard to keep track of all the Legos you need.

IBM hexadecimal floating point is a way to make it easier to work with really big or really small numbers in a computer. The word "hexadecimal" means that instead of just using the numbers 0-9, we also use letters like A through F. This gives us even more Legos to work with!

The word "floating point" means that we can move the decimal point around to make the number bigger or smaller. Imagine you have a number like 123, but you want to make it bigger. You can move the decimal point over to get 1230, which is ten times bigger! Or you can move it even further to get 12300, which is 100 times bigger!

But sometimes, you might want to make the number really, really tiny. If you move the decimal point to the left, the number gets smaller. So you can move it to get 12.3, which is ten times smaller than 123. Or you can move it again to get 1.23, which is 100 times smaller!

IBM hexadecimal floating point lets you work with big and small numbers like this, but it also helps keep track of all the Legos you need. Computers use binary code to store and calculate numbers, so IBM hexadecimal floating point makes sure that the computer is using the right Legos to get the right answer.

So basically, IBM hexadecimal floating point is like a math superpower for computers. It lets them work with really big or really small numbers, and helps them keep track of all the Legos they need to do it!