The String function concatenates zero or more expressions into a single string. Unlike the cat function, String always returns a single string, never a name, unevaluated concatenation (||), or sequence.

Each argument that is already a string (i.e. of type string) is appended to the result unchanged.

Arguments that are of type Array with one dimension or Vector, and a datatype of integer[1] (i.e. bytes) are treated as character arrays, with each entry appended to the result as a single character. If a zero valued entry is encountered, the remaining entries are skipped. This is analogous to how strings are generally used in the C and C++ (and many other) programming languages.

(The reverse transformation, converting a string into such an Array, can be easily accomplished by passing a string to the Array function, for example, Array("This is a string.").)

All other arguments, x, are first converted into a 1D Maple language representation in the same form that would be produced by sprintf("%a",x), and the resulting string is appended to the result.

If called with no arguments, String returns the empty string, "".

$\mathrm{String}\left(\right)$

$\mathrm{String}\left(a\,b\right)$

$''ab''$

$\mathrm{String}\left(''1+1=''\,1+1\right)$

$''1+1=2''$

$\mathrm{hi}≔\mathrm{Array}\left(\left[72\,101\,108\,108\,111\right]\,\mathrm{datatype}=\mathrm{integer}\left[1\right]\right)$

$\mathrm{hi}≔\left[\begin{array}{ccccc}72& 101& 108& 108& 111\end{array}\right]$

$\mathrm{String}\left(\mathrm{hi}\right)$

$''Hello''$

$\mathrm{String}\left(x+y^2\right)$

$''y^2+x''$

$\mathrm{String}\left(''a''\,1..5\right)$

$''a1\; ..\; 5''$

$\mathrm{String}\left(f\left(\right)\,c\right)$

$''f()c''$

$\mathrm{String}\left(\mathrm{hi}\,'',''\,\mathrm{world}!\right)$

$''Hello,\; world!''$

$s≔\mathrm{convert}\left(''a\; message''\,\mathrm{list}\right)$

$s≔\left[''a''\,''''\,''m''\,''e''\,''s''\,''s''\,''a''\,''g''\,''e''\right]$

$s≔\left[\mathrm{op}\left(s\right)\,''''\,''for\; you''\right]$

$s≔\left[''a''\,''''\,''m''\,''e''\,''s''\,''s''\,''a''\,''g''\,''e''\,''''\,''for\; you''\right]$

$\mathrm{String}\left(\mathrm{op}\left(s\right)\right)$

$''a\; message\; for\; you''$

The String command was introduced in Maple 2019.

For more information on Maple 2019 changes, see Updates in Maple 2019.