Singular Manual: Formatting output

| ### A.1.6 Formatting output We show how to insert the result of a computation inside a text by using strings. First we compute the powers of 2 and comment the result with some text. Then we do the same and give the output a nice format by computing and adding appropriate space.
      // The powers of 2:
      int  n;
      for (n = 2; n <= 128; n = n * 2)
      {"n = " + string (n);}
    ==> n = 2
    ==> n = 4
    ==> n = 8
    ==> n = 16
    ==> n = 32
    ==> n = 64
    ==> n = 128
      // The powers of 2 in a nice format
      int j;
      string space = "";
      for (n = 2; n <= 128; n = n * 2)
      {
        space = "";
        for (j = 1; j <= 5 - size (string (n)); j = j+1)
        { space = space + " "; }
        "n =" + space + string (n);
      }
    ==> n =    2
    ==> n =    4
    ==> n =    8
    ==> n =   16
    ==> n =   32
    ==> n =   64
    ==> n =  128

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