# $$\text{SizeOf}$$¶

You can use the $$\text{SizeOf}$$ function to determine the number elements in a set, tuple or matrix.

You can use the \sizeof backslash command to insert this function.

The following variants of this function are available:

• $$\text{integer } \text{SizeOf} \left ( \text{<iterable>} \right )$$

The $$\text{<iterable>}$$ is the iterable type to determine the size of.

The $$\text{SizeOf}$$ function returns the number of elements.

Note

Note that, while both the $$\text{SizeOf}$$ function and $$\text{Count}$$ function can both be used to determine the size of an iterable value; however, the $$\text{SizeOf}$$ function will be faster.

Below are several examples using the $$SizeOf$$ function.

$\begin{split}A = \begin{bmatrix} 1 & 2 & 3 \\ 4 & 5 & 6 \end{bmatrix}\end{split}$
$a = \text{SizeOf } A \;\;\;\; \text{a = 6}$
$B = \left \lbrace 1, 3, \ldots, 15 \right \rbrace$
$b = \text{SizeOf } B \;\;\;\; \text{a = 8}$