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Computer Programming Articles
Page 17 of 18
Difference Between if-else and switch
In this post, we will understand the difference between if-else statement and ‘switch’ statement.If-elseDepending on the expression inside the statement, output would be generated.It uses multiple statements for multiple choices.This statement tests for equality.It can be used to test logical expressions.It can evaluate integer, character, pointer, floating-point type and boolean type.Just one of the ‘if’ or ‘else’ statement gets executed.If the condition inside the ‘if’ statement is false, then the ‘else’ statement is executed if it has been created.It is tough to edit if-else statement, especially if it is nested.SwitchThe statement that needs to be executed is decided by the ...
Read MoreDifference Between exit(0) and exit(1)
In this post, we will understand the difference between exit(0) and exit(1).exit(0)It is portable.It tells about the successful termination or completion of the program.It tells about the termination when the program is executed without any errors.The ‘EXIT_SUCCESS’ macro is used to return code 0.The ‘EXIT_SUCCESS’ can be defined as standard as zero.Syntaxexit(0);exit(1)It is not portable.It tells about the abnormal termination of the program.It tells about the termination if the program exited with certain error when the program was being executed.The ‘EXIT_FAILURE’ macro is used to return code 1.It is not restrict by standard to be 1 only.It can be used ...
Read MoreDifference Between Character Array and String
In this post, we will understand the difference between character array and string.StringsThey are immutable.Once they are defined, they can’t be changed.It refers to a sequence of characters, which is represented as a single data type.It contains built-in functions such as substring(), charAt().The ‘+’ operator can be used to append strings together, which would form a new string.The charAt() method helps access characters at a specific index within a ‘String’.These strings are stored in the ‘String Constant Pool’.It is not preferred to store passwords in strings in Java.A string can be converted to a character array using toCharArray() method of ...
Read MoreDifference Between Float and Double
In this post, we will understand the difference between float and double data types.floatIt has a single precision.It takes 4 bytes of memory.According to IEEE, it has 32-bit precision.It is used with graphic based libraries.It improves the processing power of programs.It is simple to manage by compilers.Its value can be between 1.2E-38 to 3.4E+38.It can have a precision of up to 6 decimal places.doubleIt has a double precision.It takes 8 bytes of memory.According to IEEE, it has 64-bit precision.Its value can be between 2.3E-308 to 1.7E+308.It can have a precision of up to 15 decimal places.It is considered as the ...
Read MoreDifference between new and malloc( )
In this post, we will understand the difference between ‘new’ and ‘malloc’.newIt is present in C++, Java, and C#.It is an operator that can be used to call the constructor of the object.It can be overloaded.If it fails, an exception is thrown.It doesn’t need the ‘sizeof’ operator.It doesn’t reallocate memory.It can initialize an object when allocating memory for it.The memory allocated by ‘new’ operator can be de-allocated using ‘delete’ operator.It reduces the execution time of the application.Example#include using namespace std; int main(){ int *val = new int(10); cout
Read MoreDifference Between malloc and calloc
In this post, we will understand the difference between malloc and calloc.MallocThe method ‘malloc’ is used to assign a block of memory when it is requested.It doesn’t clear the memory.It only initializes the allocated memory when explicitly requested.It allocates memory of a specific ‘size’.This size is passed as parameter to it.This size is allocated from a heap.It performs its job quickly.Examplevoid *malloc(size_t size);CallocIt assigns the requested memory to multiple blocks.This memory allocated is initiated to zero.This initialization to 0 is done by ‘calloc’ method.It allocates memory to the required operation of a specific ‘size’, i.e num * size.The ‘num’ refers ...
Read MoreDifference Between Stack and Queue
In this post, we will understand the difference between Stack and Queue.StackThey are based on LIFO- Last In First Out.This means the element inserted at the end is the first element to get deleted.Insertion and deletion happen in a stack from one end only, i.e the top.Insert operation is known as ‘push’ operation.Delete operation is known as ‘pop’ operation.A pointer is used to access the list, it is known as ‘top’.The ‘top’ points to the last element of the list.It helps work with problems associated with recursion.Representation of Stack (LIFO)QueuesThey are based on FIFO- First In First Out.This means the ...
Read MoreDifference Between Applet and Application
In this post, we will understand the difference between Applet and Application.ApplicationThey are similar to Java programs.They can be executed independently without using web browser.It requires a ’main’ function for it to be executed.Java applications have full access to local file system and network.They can access all kinds of resources that are available to the system.They can execute the programs with the help of the local system.An application program is required when a task needs to be directly performed for the user.AppletsThey are small Java programs.They have been designed to be included with HTML documents.They need Java enabled web browser ...
Read MoreDifference Between Link and Association
In this post, we will understand the difference between Link and Association.LinkIt can be understood as the physical connection between objects.It helps tell about the relationship among objects.It is represented using line segment between objects.They can’t be referenced.It is used in UML designs.AssociationIt is a specification about the collection of links.The connections are related to classes.It is a general relationship between classes.They are implemented using programming languages as a reference model.It shows connections between classes using line segments.It is used in UML designs.
Read MoreDifference Between Friend Function and Friend Class
In this post, we will understand the difference between Friend function and Friend class.Friend FunctionIt is usually used with operator overloading operation.It is used with the ‘friend’ keyword.It helps give a non-member function the access to the private members of the class.It has to be declared before it is used.It is used to access private and protected members of the class.It can be a global function or a function in another class.Exampleclass Node { private: int val; Node* next; // Other members of Node Class // friend int LinkedList::search(); // Only search method ...
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