Analysis of Structures - Baustatik-Info-Server

2.3. OPERATORS Page 15(plus and minus). Unary operators will always be applied first. To change the standard precedence of theoperators we use like in mathematics parenthesis to dictate the way a formula should be evaluated.2.3.1 Unary OperatorsUnary operators are working only on one value, therefor unary. In Python there are three unary operatorsavailable.Operator Comment Example+ plus operator a = 2 >>> x = +a >>> +2- minus operator a = 2 >>> x = -a >>> -2˜ bitwise inversion a = 2 >>> x = ˜a >>> -3The bitwise inversion shows the internal representation of negative numbers. A negative number isrepresented by the so called b-complement of a number. This is the complement, i.e. the bitwise invertednumber plus 1. So we get−a =∼ a + 1 or ∼ a = −(a + 1) (2.1)2.3.2 Arithmetic OperatorsPython offers the following arithmetic operators. You should be careful with the usage of data typesespecially within divisions. If you use integers, the result generally will be truncated. 1Operator Comment Example+ sum operator x = 2+3 >>> 5- substraction operator x = 4-2 >>> 2* product operator x = 2*4 >>> 8/ division operator x = 9/2 >>> 4x = 9./2. >>> 4.5** power operator x = a**2% modulo operator x = a%2// integer division operator x = a//22.3.3 Bit OperatorsLike in C bit operators can be easily be used to manipulate a number’s bits. The following operators areavailable 21 The exception of the power operator all the arithmetic operators are used with the same symbol like in C. In C there is nopower operator available.2 Python’s bit operators are exactly the some as the C bit operators.2.12.2011