A statement to print the value of a variable or a string of characters (set of characters enclosed by double quotes) to the screen begins with cout, followed by the insertion operator, («) which is created by typing the ``less than'' character (<) twice. The data to be printed follows the insertion operator.
Declaring (Creating) Variables
type variableName = value; Where type is one of C++ types (such as int ), and variableName is the name of the variable (such as x or myName). The equal sign is used to assign values to the variable.
cout in C++
The cout object in C++ is an object of class iostream. It is defined in iostream header file. It is used to display the output to the standard output device i.e. monitor.
The cout object is used to display the output to the standard output device. It is defined in the iostream header file.
Cout is used with the insertion operator, which is written as << (two “less than” signs). The actual output then follows, written within quotation marks. The line must end with a semicolon. Become familiar with other uses of cout.
Std::cout is the preferred way to print a string in C++.
std::cout is an object of class ostream that represents the standard output stream oriented to narrow characters (of type char). It corresponds to the C stream stdout.
cout is an object of the output stream that is used to show output. Basically, cin is an input statement while cout is an output statement. They also use different operators. cin uses the insertion operator( >> ) while cout uses the extraction operator( << ).
The cout command is a data stream which is attached to screen output and is used to print to the screen, it is part of the iostream library. At the end of Hello World there is a special character '\n'. This representes the new line character and the '\n' should be treated as a single character.
cout does not have a return value. cout is an object of type ostream . operator << has a return value, it returns a reference to cout .
The ampersand symbol & is used in C++ as a reference declarator in addition to being the address operator.
To declare a string variable, use the DECLARE keyword, then type the @variable_name and variable type: char, varchar. To assign a value to a variable, use the keyword SET. The CHAR is a data type with fixed length and loads empty spaces.
To convert a variable, do the following: In the Variables panel, click Convert to Text. The Convert Variables to Text dialog displays.
Cout means console output which is used to display the result or statements in our screen.
cout is an output statement in c++ programming language while print is just a statement used when writing pseudocodes for and it becomes an output statement in C when it is written as printf. both tasks is same but difference is cout is used in c++ n print is used in c .
We can use cast type here, by casting into char we are able to get result in character format. We can use cout<<char(65) or cout<<char(var), that will print 'A'. (65 is the ASCII value of 'A'). Here, output will be A.
Reference variable is an alternate name of already existing variable. It cannot be changed to refer another variable and should be initialized at the time of declaration and cannot be NULL. The operator '&' is used to declare reference variable.
cin and cout are streams and do not exist in C. You can use printf() and scanf() in C.
int first , second , third; cout<<"enter the first number: "; cin>>first; cout<<"enter the second number: "; cin>>second; cout<<"enter the third number: "; cin>>third; cout<<float average=(first+second+third)/3; c++ variable-declaration.
You can print all of the normal C types with printf by using different placeholders: int (integer values) uses %d. float (floating point values) uses %f. char (single character values) uses %c.
cout is an instance of the class std::ostream , and yes, it's a global variable.
We can take string input in C using scanf(“%s”, str).
using printf()
If we want to do a string output in C stored in memory and we want to output it as it is, then we can use the printf() function. This function, like scanf() uses the access specifier %s to output strings. The complete syntax for this method is: printf("%s", char *s);
Using the to_string() Method
This function is used to convert not only the integer but numerical values of any data type into a string. The to_string() method is included in the header file of the class string, i.e., <string> or <cstring>.