if Statement in C Language

This is the most powerful and simple form of decision control statement. If statement is always used with a condition and responsible for modifying the flow of execution of a program. In this form, a set of statements inside the body of If condition are executed only if the condition evaluates result as true. The syntax for if statement is as follows:-

    if(condition)
    {
        Statements ;
    }

#include<stdio.h>
#include<conio.h>
void main()
{
	int no;
	printf("Enter a number");
	scanf("%d",&no);
	if(no<0)
	{
		printf("%d is a negative number",&no);
	}
	getch();
}

Flow Chart of if Statement

If statement is used to execute a particular area of code if and only if the condition is true otherwise code does not executed in given block.