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# Meaning of Mathematical symbol

What does this symbol mean?

Note by Guiseppi Butel
3 years, 1 month ago

MarkdownAppears as
*italics* or _italics_ italics
**bold** or __bold__ bold
- bulleted- list
• bulleted
• list
1. numbered2. list
1. numbered
2. list
Note: you must add a full line of space before and after lists for them to show up correctly
paragraph 1paragraph 2

paragraph 1

paragraph 2

[example link](https://brilliant.org)example link
> This is a quote
This is a quote
    # I indented these lines
# 4 spaces, and now they show
# up as a code block.

print "hello world"
# I indented these lines
# 4 spaces, and now they show
# up as a code block.

print "hello world"
MathAppears as
Remember to wrap math in $$...$$ or $...$ to ensure proper formatting.
2 \times 3 $$2 \times 3$$
2^{34} $$2^{34}$$
a_{i-1} $$a_{i-1}$$
\frac{2}{3} $$\frac{2}{3}$$
\sqrt{2} $$\sqrt{2}$$
\sum_{i=1}^3 $$\sum_{i=1}^3$$
\sin \theta $$\sin \theta$$
\boxed{123} $$\boxed{123}$$

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The convention here in Brilliant is that whenever a problem has a non-integer solution, but the asker wants an integer answer, the Floor value of the product of that non-integer solution and some power of 10 is asked for. For instance, instead of saying, "State the answer of 10000 * radius", the asker could say, "Find $$\left\lfloor 10000\cdot r \right\rfloor$$". Keep in mind that the integer value is not the rounded value of 10000 * radius, but simply the digits of the non-integer solution up to the first 5 decimal places. One thing wrong with asking for "the answer of 10000 * radius" is that it fails to specify whether it's rounded off or not. Using the Floor function eliminates this ambiguity.

Personally, I prefer to say, "Find Floor $$\left\lfloor 10000\cdot r \right\rfloor$$", as to leave no doubt or confusion about what kind of an answer I'm asking for.

The Floor function is also known as the Greatest Integer function, i.e., the largest integer equal to or less than the number.

- 3 years, 1 month ago

Floor of 1000 $$\times$$ r

- 3 years, 1 month ago