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  1. #!/usr/bin/env node
  2. var assert = require('assert');
  3. var finish = process.argv.length > 2 ? 0+process.argv[2] : 2.0;
  4. var d = finish / 2.0;
  5. var f = d;
  6. for (var i = 0; i < 54; i++) {
  7.     var s = d.toString()
  8.     assert.equal(parseFloat(s), d);
  9.     console.log(s + ' = ' +  d.toPrecision(17));
  10.     if (d == finish) process.exit(0);
  11.     f /= 2; d += f;
  12. }
  13.  
Success #stdin #stdout 0.17s 51128KB
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stdin
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Standard input is empty
stdout
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1 = 1.0000000000000000
1.5 = 1.5000000000000000
1.75 = 1.7500000000000000
1.875 = 1.8750000000000000
1.9375 = 1.9375000000000000
1.96875 = 1.9687500000000000
1.984375 = 1.9843750000000000
1.9921875 = 1.9921875000000000
1.99609375 = 1.9960937500000000
1.998046875 = 1.9980468750000000
1.9990234375 = 1.9990234375000000
1.99951171875 = 1.9995117187500000
1.999755859375 = 1.9997558593750000
1.9998779296875 = 1.9998779296875000
1.99993896484375 = 1.9999389648437500
1.999969482421875 = 1.9999694824218750
1.9999847412109375 = 1.9999847412109375
1.9999923706054688 = 1.9999923706054688
1.9999961853027344 = 1.9999961853027344
1.9999980926513672 = 1.9999980926513672
1.9999990463256836 = 1.9999990463256836
1.9999995231628418 = 1.9999995231628418
1.999999761581421 = 1.9999997615814209
1.9999998807907104 = 1.9999998807907104
1.9999999403953552 = 1.9999999403953552
1.9999999701976776 = 1.9999999701976776
1.9999999850988388 = 1.9999999850988388
1.9999999925494194 = 1.9999999925494194
1.9999999962747097 = 1.9999999962747097
1.9999999981373549 = 1.9999999981373549
1.9999999990686774 = 1.9999999990686774
1.9999999995343387 = 1.9999999995343387
1.9999999997671694 = 1.9999999997671694
1.9999999998835847 = 1.9999999998835847
1.9999999999417923 = 1.9999999999417923
1.9999999999708962 = 1.9999999999708962
1.999999999985448 = 1.9999999999854481
1.999999999992724 = 1.9999999999927240
1.999999999996362 = 1.9999999999963620
1.999999999998181 = 1.9999999999981810
1.9999999999990905 = 1.9999999999990905
1.9999999999995453 = 1.9999999999995453
1.9999999999997726 = 1.9999999999997726
1.9999999999998863 = 1.9999999999998863
1.9999999999999432 = 1.9999999999999432
1.9999999999999716 = 1.9999999999999716
1.9999999999999858 = 1.9999999999999858
1.999999999999993 = 1.9999999999999929
1.9999999999999964 = 1.9999999999999964
1.9999999999999982 = 1.9999999999999982
1.9999999999999991 = 1.9999999999999991
1.9999999999999996 = 1.9999999999999996
1.9999999999999998 = 1.9999999999999998
2 = 2.0000000000000000
https://ideone.com/qonDEO
language:
Node.js (node 11.12.0)
created:
8 years ago
visibility:
public

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