Truncating a number is the process of omitting digits beyond a certain point in the number, filling in zeros if necessary to make the truncated number approximately the same size as the original number. In mathematics and computer science, truncation limits the number of digits to the right of the decimal point. This is done by shortening a number by a given place value and filling in any zero to keep it the same size.The Math, trunc() function returns the integer part of a number by removing the fractional digits. To truncate a number to 1 decimal place, omit all digits after the first decimal place.
Calculates the integral part of a specified double-precision floating-point number. It is common for stage 3 to be omitted and for a number such as 3547 to be truncated to 35 to 2 significant digits.With computers, truncation can occur when a decimal number was typecast as an integer; it is truncated to zero decimal digits because integers cannot store non-integer real numbers. In this case, the truncation of a polynomial P to degree n can be defined as the sum of all P terms of degree n or less. Starting with Visual Basic 15.8, double-to-integer conversion performance is optimized if you pass the value returned by the Truncate method to any of the integral conversion functions, or if the Double value returned by Truncate is automatically converted to an integer with the Strict option set to Off.The algorithm of subtracting 0.5 from a value and then rounding it (which truncates a positive number) actually has so many uses that Java has been good enough to include a method in your standard library that it will do it for you.
In the interest of keeping things simple, let's look at the algorithm for truncating positive numbers (and the really motivated ones can see if they can find an algorithm to truncate negative numbers). There are also truncation worksheets based on the Edexcel, AQA, and OCR exam questions, along with more guidance on where to go next if you're still stuck.Well, the algorithm differs slightly depending on whether a positive value (greater than or equal to zero) or a negative value (less than zero) is truncated. Note that the domains of the truncation function and the rounding function of any given return value are offset exactly 0.5.Truncates (cuts) the period and digits to its right, regardless of whether the argument is a positive or negative number.However, unlike the algorithm we developed earlier that takes a positive float and truncates it to an int value, the floor function receives and returns a double value (you can confirm this in the Java class documentation).