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Convert decimal integer to its hexadecimal representation

`hexStr = dec2hex(`

returns the hexadecimal,
or base-16, representation of the decimal integer `D`

)`D`

. The output argument
`hexStr`

is a character vector that represents hexadecimal digits using
the characters `0`

-`9`

and
`A`

-`F`

.

If `D`

is a numeric vector, matrix, or multidimensional array, then
`hexStr`

is a two-dimensional character array. Each row of
`hexStr`

represents an element of `D`

.