### 4.22.3 string type cast

`Syntax:`
  `string (` expression [, expression_2, ... expression_n]`)`
`Type:`
  string
`Purpose:`
  Converts each expression to a string, where expression can be of any type. The concatenated string of all converted expressions is returned.

  The elements of intvec, intmat, ideal, module, matrix, and list, are separated by a comma. No newlines are inserted.
  Not defined elements of a list are omitted.
  For link, the name of the link is used.
  For map, the ideal defining the mapping is converted.

`Note:`
  When applied to a list, elements of type intvec, intmat, ideal, module, matrix, and list become indistinguishable.

`Example:`

        string("1+1=", 2);
      ==> 1+1=2
        string(intvec(1,2,3,4));
      ==> 1,2,3,4
        string(intmat(intvec(1,2,3,4), 2, 2));
      ==> 1,2,3,4
        ring r;
        string(r);
      ==> (ZZ/32003),(x,y,z),(dp(3),C)
        string(ideal(x,y));
      ==> x,y
        qring R = std(ideal(x,y));
        string(R);
      ==> (ZZ/32003),(x,y,z),(dp(3),C)
        map phi = r, ideal(x,z);
        string(phi);
      ==> x,z
        list l;
        string(l);
      ==>
        l[3] = 1;
        string(l); // notice that l[1],l[2] are omitted
      ==> 1
        l[2] = l;
        l;
      ==> [2]:
      ==>    [3]:
      ==>       1
      ==> [3]:
      ==>    1
        string(l); // notice that lists of list is flattened
      ==> 1,1
        l[1] = intvec(1,2,3);
        l;
      ==> [1]:
      ==>    1,2,3
      ==> [2]:
      ==>    [3]:
      ==>       1
      ==> [3]:
      ==>    1
        string(l); // notice that intvec elements are not distinguishable
      ==> 1,2,3,1,1

See Type conversion and casting; print; string.

User manual for Singular version 4.4.1, 2025, generated by texi2html.