Enter a number to check.
5
The if statement in C programming is easy.
When the user enters 5 then, the test expression (num<0) becomes false. So, the statement for body of if is skipped and only the statement below it is executed.
if...else statement
The if...else statement is used, if the programmer wants to execute some code, if the test expression is true and execute some other code if the test expression is false.
Syntax of if...else
if (test expression)
statements to be executed if test expression is true;
else
statements to be executed if test expression is false;
Flowchart of if...else statement
Example of if...else statement
Write a C program to check whether a number entered by user is even or odd
#include <stdio.h>
int main(){
int num;
printf("Enter a number you want to check.\n");
scanf("%d",&num);
if((num%2)==0) //checking whether remainder is 0 or not.
printf("%d is even.",num);
else
printf("%d is odd.",num);
return 0;
}