Search results
Dec 27, 2013 · public static boolean isNegative(double d) { return Double.compare(d, 0.0) < 0; } A more efficient, if more obtuse, version is to check the signed bit. public static boolean isNegative(double d) { return Double.doubleToRawLongBits(d) < 0; } Note: Under IEEE-754 a NaN can have the same signed bit as a negative number.
Jul 20, 2009 · This yields negative infinity. If you need a float, you can either cast the result. float neg_inf = (float)-1/0.0; or use single precision arithmetic. float neg_inf = -1.0f/0.0f; The result is always the same, there is exactly one representation of negative infinity in both single and double precision, and they convert to each other as you ...
1. The result of the logical negation operator ! is 0 if the value of its operand compares unequal to 0, 1 if the value of its operand compares equal to 0. The result has type int. The expression !E is equivalent to (0==E). C11 §6.5.3.3 5. b below will typical have the value of 1 (or possible -1, see below). a = 8; b = !!a;
Nov 16, 2013 · The biased-exponent field is filled with all 1 bits to indicate either infinity or an invalid result of a computation. Positive and negative infinity. Positive and negative infinity are represented thus: sign = 0 for positive infinity, 1 for negative infinity. biased exponent = all 1 bits. fraction = all 0 bits.
Feb 6, 2018 · For double, this is 2 −1074, approximately 4.94066•10 −324. std::numeric_limits<T>::lowest() is the least finite value. It is usually a negative number large in magnitude. For double, this is −(2 1024 −2 971), approximately −1.79769•10 308.
May 6, 2012 · Double-negation turns a "truthy" or "falsy" value into a Boolean value, true or false. Most are familiar ...
May 13, 2013 · 2. You need a doubly nested query. Better to say "Find the properties (pids) that are NOT Missing ANY OF the meter types THAT the property id 7 has" or. "Find the properties (pids) such that there does not exist a metertype belonging to pid 7 that does not also belong to this pid." Select DISTINCT pid -- outer query: "Show all pids ...
1. As it says in the documents, Double.MIN_VALUE is a constant holding the smallest POSITIVE nonzero value of type double, 2^ (-1074). The trick here is we are talking about a floating point number representation. The double data type is a double-precision 64-bit IEEE 754 floating point. Floating points represent numbers from 1,000,000,000,000 ...
Oct 23, 2011 · Another method (2's complement): public int reverse(int x){. x~=x; x++; return x; } It does a one's complement first (by complementing all the bits) and then adds 1 to x. This method does the job as well. Note: This method is written in Java, and will be similar to a lot of other languages.
Jan 30, 2009 · Try this (the negative in front of the x is valid since it is a unary operator, find more here): int answer = -x; With this, you can turn a positive to a negative and a negative to a positive. However, if you want to only make a negative number positive then try this: int answer = Math.abs(x); A little cool math trick!
