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The String class belongs to the java.lang package. This is the default package of the Java language therefore it is not mandatory to import it to use its classes.
C++ is a programming language developed by Bjarne Stroustrup in 1979 at Bell Labs. C++ is regarded as a middle-level language, as it comprises a combination of both high-level and low-level language features. It is a superset of C, and that virtually any legal C program is a legal C++ program. C++ runs on a variety of platforms, such as Windows, Mac OS, and the various versions of UNIX.It was designed with a bias toward system programming and embedded, resource-constrained and large systems, with performance, efficiency and flexibility of use as its design highlights. It has been used in the ... Read More
There are two separate concepts here − scope, which determines where a name can be accessed - global and local storage duration, which determines when a variable is created and destroyed - static and auto Scope Local variables can be used only by statements that are inside that function or block of code. Local variables are not known to functions on their own. Example Live Demo #include using namespace std; int main () { // Local variable declaration: int a, b; int c; // actual initialization a = 10; b = 20; c = a + b; cout
C++ is known to be a very powerful language. C++ allows you to have a lot of control as to how you use computer resources, so in the right hands, its speed and ability to cheaply use resources should be able to surpass other languages. Thanks to C++'s performance, it is often used to develop game engines, games, and desktop apps. Many AAA title video games are built with C++.C++'s greatest strength is how scalable it could be, so apps that are very resource intensive are usually built with it. As a statically typed language, C++ is generally more performant ... Read More
The notable differences between concat() method and +operator are:concat() method+operatorYou cannot concat a null value to a String using the concat() method.You can concat null value using the ‘+’ operator.Using the concat() method you can concat only two String variables.Using the ‘+’ operator you can concat multiple values.Using the concat() method you can concat only String type of arguments.Using the ‘+’ operator you can concat any type of arguments.
So you've decided to learn how to program in C++ but don't know where to start. Here's a brief overview of how you can get started. Get a C++ Compiler This is the first step you'd want to do before starting learning to program in C++. There are good free C++ compilers available for all major OS platforms. Download one that suits your platform or you can use the tutorialspoint.com's online compiler on www.tutorialspoint.com/compilers/online-cpp-compiler.htm GCC − GCC is the GNU Compiler chain that is basically a collection of a bunch of different compilers created by GNU. You can download ... Read More
On getting the result of the following, you can find whether a variable is ‘undefined’. If the result is “false”, it means the variable is undefined. Here, the variable results in “True” Example Live Demo var res = 10; if(res) { document.write("True"); } else { document.write("False"); }
A secured cookie is a cookie that works with HTTP/HTTPS, known as a httpOnly cookie. These cookies are only used for HTTP requests, so unethical access though scripting is not possible. Therefore, cross-site scripting can be stopped, which in turn stops attacks.The secure attribute is always activated for secured cookies, so it is transmitted with encrypted connections, without any hassles and security issues. The httpOnly flag does not give cookie access to JavaScript or any non-HTTP methods. This is situated in the secure cookie header.The secure attribute and httpOnly flag ensure that the browser does not allow malicious scripts to ... Read More
HashMap is non-syncronized and is not thread safe while HashTable is thread safe and is synchronized. HashMap allows one null key and values can be null whereas HashTable doesn't allow null key or value. HashMap is faster than HashTable. HashMap iterator is fail-safe where HashTable iterator is not fail-safe. HashMap extends AbstractMap class where HashTable extends Dictionary class.
It is not possible to exit from an if block of Python code. The break keyword does appear in if block but it has to inside a loop. It is however possible to exit from entire program from inside if block by sys.exit()