Introduction
The purpose of the exclamation mark (!) in the code from the Point in Polygon Test is to indicate a logical NOT operation. This operation is used to reverse the result of a comparison or a boolean expression. In this particular code, the exclamation mark is used to check if a point is not inside a polygon. This is an important concept in computer science and is used in many different applications.
Solution
The “!” in this code is a logical NOT operator. It is used to reverse the result of a boolean expression. In this case, it is used to check if a point is not inside a polygon.
Any non-zero number or non-null pointer is considered to have a logical value of “true”, whereas a number with value 0 or a null pointer is considered to have a logical value of “false”.
The ! operator is the logical NOT operator (as opposed to a bit-wise NOT operator). It inverts the logical value of its operand, producing the integer value 0 if the operand has a logical value of “true”, and the value 1 if the operand has a logical value of “false”.
solved What is the purpose of “!” in this code from “Point in Polygon Test”? [closed]
The purpose of the “!” in the code from the “Point in Polygon Test” is to indicate a logical NOT operation. This means that the code is checking to see if a point is not inside a polygon. The code is used to determine whether a point is inside or outside of a given polygon. If the point is not inside the polygon, the code will return a false value. If the point is inside the polygon, the code will return a true value.
The “!” is used to indicate a logical NOT operation because it reverses the result of the comparison. For example, if the comparison is “is the point inside the polygon?”, the “!” will reverse the result to “is the point not inside the polygon?”. This allows the code to determine whether a point is inside or outside of a given polygon.
The “Point in Polygon Test” is a useful tool for determining whether a point is inside or outside of a given polygon. By using the “!” operator, the code can quickly and accurately determine whether a point is inside or outside of a given polygon.