Alphanumeric, also called alphameric, is the set of letters of the alphabet and numeric characters from 0 through 9. It is a term used to describe any subset formed from this collection of symbols. Alphanumeric is also regarded as the combination of Latin letters and Arabic digits.
The term alphanumeric does not include punctuation and mathematical symbols. It is commonly used as the required format in creating passwords and file names. The string of characters “aBc123” is alphanumeric, but “#s?34T” is not.
Alphanumeric characters in the POSIX/C locale consist of either 36 case-insensitive symbols (A-Z and 0-9) or 62 case-sensitive characters (A-Z, a-z and 0-9).
Learn MoreThe only numbers that have two divisors, themselves and one, are prime numbers. Prime numbers are always greater than one and are positive numbers.
Full Answer >In mathematics, natural numbers are whole numbers starting with 1 and going upward. In some fields, the natural numbers start with 0 but, ultimately, natural numbers do not include negative numbers or fractions.
Full Answer >All prime numbers are odd except for the number two. A prime number is defined as any whole number greater than one that has no positive divisors except for one and itself. Since two can only be divided by the numbers one and two, it is prime.
Full Answer >To round numbers, decide on the place to which to round. Round up if the digit itself or the digit to its right is five or greater, and round down if the number is less than five. Rounding a number means to reduce its digits while keeping the value similar.
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