On most phones, the 4 key is associated with the letters G, H, and I, [85] but on the BlackBerry Pearl, it is the key for D and F. On many computer keyboards, the "4" key may also be used to type the dollar sign ($) if the shift key is held down. It is the number of bits in a nibble, equivalent to half a byte [86]

Some buildings skip floor 4 or replace the number with the letter "F," particularly in heavily Asian areas. In the NATO phonetic alphabet, the digit 4 is called "fower." The number of characters in a canonical four-character idiom.

Pronunciation of the number 4. The number four is a number and a numeral. It comes after the number three, and before the number five. In Roman numerals, it is IV.

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2023年10月19日 · -3.5e8 or 4.7E-9 Rounding. Specify whether you want to round your answer, and how many digits or decimal places to round to. This calculator uses addition, subtraction, multiplication or division for calculations on positive or negative decimal numbers, integers, real numbers and whole numbers.

2024年12月8日 · A West Arabic numeral, ultimately from Indic numerals (compare Devanagari ४ (4)), a cursive form of four lines (to represent the number four) arranged in the shape of a cross (resembling +). See 4 § Evolution of the Hindu-Arabic digit for more.