What Is A Default Value
A default value is a value that is automatically assigned to a variable or field when no other value has been explicitly assigned by the programmer. It is a value that is assumed to be true or correct unless the programmer specifies otherwise. Default values are used in many programming languages and are an important concept to understand.
Default values are used in many different contexts in programming. For example, when you create a new variable in a program, it will often be assigned a default value automatically. This can be useful because it saves the programmer time and effort by eliminating the need to manually assign a value to every variable.
Another common use of default values is in function arguments. When you define a function in a program, you can specify default values for its arguments. This means that if the function is called without providing a value for one of its arguments, the default value will be used instead.
Default values can also be used in database design. When you create a new table in a database, you can specify default values for its columns. This means that if a new row is inserted into the table and no value is provided for a particular column, the default value will be used instead.
In object-oriented programming, default values are often used in constructors. When you create a new object from a class, the constructor will often assign default values to its fields or properties.
Default values are an important concept to understand because they can affect the behavior of your program in unexpected ways if you are not aware of them. For example, if you assume that a variable has a certain default value when it actually has another value, your program may not work as expected.
In conclusion, understanding what default values are and how they are used is an important part of programming. By using default values effectively, you can save time and effort while also making your code more efficient and easier to read.
Here's the list of website addresses that discuss What Is A Default Value:
- [https://www.tutorialspoint.com/cplusplus/cpp_default_arguments.htm](https://www.tutorialspoint.com/cplusplus/cpp_default_arguments.htm)
- [https://www.geeksforgeeks.org/default-arguments-c/](https://www.geeksforgeeks.org/default-arguments-c/)
- [https://www.javatpoint.com/default-argument-in-cpp](https://www.javatpoint.com/default-argument-in-cpp)
- [https://www.guru99.com/cpp-default-parameters.html](https://www.guru99.com/cpp-default-parameters.html)
- [https://www.programiz.com/cpp-programming/default-arguments](https://www.programiz.com/cpp-programming/default-arguments)
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