assertNear(Math.log10(2), 0.3010299956639812);
assertNear(Math.log10(7), 0.8450980400142568);
assertNear(Math.log10(Math.E), Math.LOG10E);

for (var i = -10; i < 10; i++)
    assertNear(Math.log10(Math.pow(10, i)), i);

reportCompare(0, 0, 'ok');