What are Backslash character constants in C language?

A backslash ( \ ) that allows a visual representation of some nongraphic characters introduces an escape.

One of the common escape constants is the newline character (
).

Backslash Characters

The backslash characters are as follows −

Character	Meaning
‘\a’	alert
‘\b’	backspace
‘\f’	form feed
‘ ’	newline
‘\t’	horizontal tab
‘\r’	carriage return
‘\v’	vertical tab
‘\’	backslash
‘\’ ’	single quote
‘\" ’	double quote
‘\?’	Question mark

Example program

Following is the C program for the backslash character constants −

Example

Live Demo

#include<stdio.h>
#define PI 3.14
float area;
void main(){
   double r;
   r=1.0;
   area = PI * r * r;
   printf("Area is %d 
", area); // /n is used to enter the next statement in newline
}