x

x is the answer we always hoped to find. It has a remarkable presence in mathematical expressions such as equations and function definitions.

x, in roman numerals, represents the tenth number.

x is also used as a symbol for represent a “cancel” operation or “wrong” choice as an error in feedback messages, concerning user interface guidelines.

x may be a check mark usually applied into ballot boxes in test exams and forms, also known as the x mark.

x, in english, is also used as a contraction to reduce words into simple expressions, like x-ray, x-men, xp (experience in most adventure and role-playing games) and even “xing”, which means crossing, in many road signs.

x… such a simple letter which brings a lot of meanings with it.

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