C Else
The else Statement
Use the else statement to specify a block of code
to be executed if the condition is false.
Syntax
if (condition) {
// block of code to be executed if the condition is true
} else {
// block of code to be executed if the condition is false
}
In the example below, the program checks the value of time.
If it is less than 18, it prints "Good day". Otherwise, it prints "Good evening":
Example
int time = 20;
if (time < 18) {
printf("Good day.");
} else {
printf("Good evening.");
}
// Outputs "Good evening."
Try it Yourself »
Example explained
In the example above, time (20) is greater than 18, so the condition is false.
Because of this, we move on to the else condition and print to the screen "Good
evening". If time was less than 18, the program would print "Good day".
Visualize if...else
Choose a value for time below to see which block runs:
Code
How C decides
Output
Explanation
Using a Boolean Variable
You can also store the condition in a boolean variable and use it in the if...else statement.
This can make the code easier to read:
Example
int time = 20;
bool isDay = time < 18;
if (isDay) {
printf("Good day.");
} else {
printf("Good evening.");
}
Try it Yourself »
Tip: A name like isDay makes it easy to understand what the condition means.
