I recently dug out an old book of mine, The Hawaiian Computer Mystery, published in 1985. There is a fragment of code in BASIC on page 81,
1 For N = 7 to 77
2 Print N, SQR(N) - INT (SQR [N] )
3 Next N
4 End
I can sort of see what it should do, but I can't get it to run. There's apparently an error in the second line, but I can't figure out what.
Assuming that you must find the digits after the decimal point of the square root of a number, than the issue is with the square brackets - they must be round. The following code:
1 For N = 7 to 77
2 Print N, SQR(N) - INT (SQR (N) )
3 Next N
4 End
(blank line in the end) will produce the following result:
7 .64575124
8 .8284271
9 0
10 .1622777
11 .31662488
12 .46410155
13 .60555124
14 .7416575
15 .87298346
16 0
17 1.23105526E-1
18 .2426405
19 .35889912
20 .47213602
21 .5825758
22 .69041586
23 .7958317
24 .89897966
25 0
26 .09901953
27 .19615221
28 .29150248
29 .38516474
30 .47722578
31 .5677643
32 .65685415
33 .7445626
34 .8309517
35 .91608
36 0
37 .08276272
38 .16441393
39 .24499798
40 .3245554
41 .40312433
42 .48074055
43 .5574384
44 .63324976
45 .7082038
46 .78233004
47 .8556547
48 .9282031
49 0
50 .07106781
51 .14142847
52 .21110249
53 .28010988
54 .34846926
55 .41619825
56 .483315
57 .54983425
58 .6157732
59 .68114567
60 .7459669
61 .8102498
62 .8740077
63 .93725395
64 0
65 6.2257767E-2
66 .1240387
67 .18535233
68 .24621105
69 .30662346
70 .36660004
71 .42614937
72 .485281
73 .5440035
74 .60232544
75 .6602545
76 .71779823
77 .77496433