Algosim documentation: for

for

Evaluates an expression for every integer value in a range.

Syntax

Description

for(k, a, b, expr) evaluates expr(k) max(b − a + 1, 0) times for k = a, k = a + 1, ..., and k = b. for always returns null, so it is used for its side effects.

Examples

c ≔ ToList(ZeroVector(10)); for(i, 1, 1000000, inc(c[1 + RandomInt(10)])); c
100055
100137
100092
99774
100109
100506
99629
100282
99376
100040

for(k, 35, 81, (PercussionNoteOn(k, 75); sleep(.1)))


x ≔ 600;
n ≔ 360;
pm ≔ CreatePixmap(x, x);
for(i, 1, n,
  (
    pm ≔ DrawLine(
      pm,
      RandomInt(3⋅x) − x,
      RandomInt(3⋅x) − x,
      RandomInt(3⋅x) − x,
      RandomInt(3⋅x) − x,
      "black")
  )
);
GaussianBlur(ComponentHighlight(pm), 2, 3)

Image 1

 S ≔ '();
 for
   (
     n, 0, 12,
     VarAppend
     (
       S,
       (
         s ≔ '();
         for(k, 0, n, VarAppend(s, StringPad(string(binomial(n, k)), 6, "c")));
         join(s, "")
       )
      )
   );
 S @ (s ↦ StringPad(s, 80, "c"))

                                       1
                                    1     1
                                 1     2     1
                              1     3     3     1
                           1     4     6     4     1
                        1     5     10    10    5     1
                     1     6     15    20    15    6     1
                  1     7     21    35    35    21    7     1
               1     8     28    56    70    56    28    8     1
            1     9     36    84   126   126    84    36    9     1
         1     10    45   120   210   252   210   120    45    10    1
      1     11    55   165   330   462   462   330   165    55    11    1
   1     12    66   220   495   792   924   792   495   220    66    12    1

See also