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77 lines
1.1 KiB
77 lines
1.1 KiB
/*===
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0.00
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1.00
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1.00
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0.9999
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0.99990
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1.23457e+7
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1.234568e+7
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12345678
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12345678.0
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8.76543e+7
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8.765432e+7
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87654321
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87654321.0
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5.556e+4
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55555
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4.444e+4
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44444
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1.000e+5
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99999
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0
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0
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0.0
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0.00
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0
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0
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0.0
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0.00
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===*/
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function precisionTest() {
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function test(x, n) {
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print(new Number(x).toPrecision(n));
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}
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test(0, 3);
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test(1, 3);
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test(0.9999, 3);
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test(0.9999, 4);
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test(0.9999, 5);
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test(12345678, 6); // rounds up
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test(12345678, 7); // rounds up
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test(12345678, 8);
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test(12345678, 9);
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test(87654321, 6); // rounds down
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test(87654321, 7); // rounds down
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test(87654321, 8);
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test(87654321, 9);
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test(55555, 4); // rounds up
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test(55555, 5);
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test(44444, 4); // rounds down
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test(44444, 5);
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test(99999, 4); // rounds up, carries
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test(99999, 5);
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// NB: precision=0 is a RangeError
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test(+0, undefined); // -> ToString()
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test(+0, 1);
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test(+0, 2);
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test(+0, 3);
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test(-0, undefined); // -> ToString()
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test(-0, 1);
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test(-0, 2);
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test(-0, 3);
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}
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try {
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precisionTest();
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} catch (e) {
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print(e);
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}
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