C++ cout

cout with Insertion Operator

The "c"in cout refers to "character" and "out" means "output". Hence cout means "character output". The cout object is used along with the insertion operator << in order to display a stream of characters.

The cout object is used along with the insertion operator << in order to display a stream of characters. For example,

#include <iostream>
using namespace std;

int main() 
{
     int var1 = 25, var2 = 50;

     cout << var1;
     cout << "Some String";
     cout << var2;

The<< operator can be used more than once with a combination of variables, strings, and manipulators.

cout << var1 << "Some String" << var2 << endl;

cout with Member Functions

he cout object can also be used with other member functions such as put(), write(), etc. Some of the commonly used member functions are:

• cout.put(char &ch): Displays the character stored by ch.

• cout.write(char *str, int n): Displays the first n character reading from str.

• cout.setf(option): Sets a given option. Commonly used options are left, right,scientific, fixed, etc.

• cout.unsetf(option): Unsets a given option.

• cout.precision(int n): Sets the decimal precision to n while displaying floating-point values. Same as cout << setprecision(n).