*<math>\log_{10}(x)</math> is related to the number of decimal digits of a positive integer x: the number of digits is the smallest integer strictly bigger than <math>\log_{10}(x)</math>. | *<math>\log_{10}(x)</math> is related to the number of decimal digits of a positive integer x: the number of digits is the smallest integer strictly bigger than <math>\log_{10}(x)</math>. |