from ±5 x 10-324 to ±1.7976931348623157 x 10+308.
var i=1; // integer var f=3.2345; // float
Usually you write number values in base-10, but you can express values as hexadecimal (base-16) values or as octal (base-8) as well.
// A hexadecimal literal begins with "0x" or "0X" // followed by a sequence of hexadecimal digits: // 0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F var h=0xf0; // 15*16 + 0 = 240 (base 10) var h=0xfff; // 15*16*16 + 15*16 + 15 = 4095 (base 10) // A octal literal begins with "0" // followed by a sequence of octal digits: // 0,1,2,3,4,5,6,7 var h=070; // 7*8 + 0 = 56 (base 10)
Floating-point is represented as the integral part of the number,
followed by a decimal point and the fractional part of the number.
var x=.333333333333333333; var y=6789.3476;
You can also express the floating-point values with exponential notation.
This is done by putting the character e (or E) after the decimal digits,
followed by an optional plus or a minus sign, followed by an integer exponent.
// The full floating value syntax is then: // [digits][.digits][(E|e)[(+|-)]digits] var f=32.12345E-32; // 32.12345 * 10-32 var z=31.567e23; // 31.567 * 1023
Constant Meaning Infinity Special value to represent infinity. When a floating-point value becomes larger than the largest representable finite number. NaN Special Not-a-Number value. (when a mathematical operation (such as division of zero by zero) yields an undefined result or an error.)
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