C if...else Statements
The if-else statement in C is employed to make decisions based on conditions. It enables you to run a block of code if a given condition is true, and another block of code if the condition is false.
The syntax of the C if-else statement is:
if (condition) {
//code to be executed if the condition is true
} else {
//code to run if the condition is untrue
}Example:
#include <stdio.h>
int main ()
{
int num = 15;
if (num > 0) {
printf ("%d is a positive number.\n", num);
} else {
printf ("%d is a negative number.\n", num);
}
return 0;
}Output:
15 is a positive number.
if-else Ladder
If we wish to verify several conditions, then an if-else ladder may be employed.
Syntax:
if
(condition)
{
//code
}
else if
(condition)
{
//code
}
else if
(condition)
{
//code
}
else
{
//code
}
Example:
#include <stdio.h>
int main ()
{
int num = -6;
if (num > 0) {
printf ("%d is a positive number.\n", num);
} else if (num < 0) {
printf ("%d is a negative number.\n", num);
} else {
printf("%d is a Zero.\n", num);
}
return 0;
}Output:
-6 is a negative number.