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In C programming, a string is a sequence of characters terminated with a null character  . For example: char c[] = “c string”; When the compiler encounters a sequence of characters enclosed in the double quotation marks, it appends a null character at the end by default. Memory Diagram.

void main() A void keyword is used to reference an empty data type. We can use the void keyword as the return type of the main function in c to depict that the function is not returning any value.

Array in C can be defined as a method of clubbing multiple entities of similar type into a larger group. These entities or elements can be of int, float, char, or double data type or can be of user-defined data types too like structures

Functions without arguments and without return values.Functions without arguments and with return values.Functions with arguments and without return values.Functions with arguments and with return values.

Functions without arguments and without return values.Functions without arguments and with return values.Functions with arguments and without return values.Functions with arguments and with return values.

A function is a block of code which only runs when it is called. You can pass data, known as parameters, into a function. Functions are used to perform certain actions, and they are important for reusing code: Define the code once, and use it many times

A function definition provides the actual body of the function. The C++ standard library provides numerous built-in functions that your program can call. For example, function strcat() to concatenate two strings, function memcpy() to copy one memory location to another location and many more functions.

Inheritance is a mechanism in which one class acquires the property of another class. For example, a child inherits the traits of his/her parents. With inheritance, we can reuse the fields and methods of the existing class. Hence, inheritance facilitates Reusability and is an important concept of OOPs.

Variables are containers for storing data values. In C++, there are different types of variables (defined with different keywords), for example: int – stores integers (whole numbers), without decimals, such as 123 or -123. double – stores floating point numbers, with decimals, such as 19.99 or -19.99.

One of the most useful data types supplied in the C++ libraries is the string. A string is a variable that stores a sequence of letters or other characters, such as “Hello” or “May 10th is my birthday!”. Just like the other data types, to create a string we first declare it, then we can store a value in it.

pointer is a variable that stores the memory address of an object. Pointers are used extensively in both C and C++ for three main purposes: to allocate new objects on the heap, to pass functions to other functions.

Use if to specify a block of code to be executed, if a specified condition is true.
Use else to specify a block of code to be executed, if the same condition is false.
Use else if to specify a new condition to test, if the first condition is false.

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