C if Keyword
Example
Test two values to find out if 20 is greater than 18. If the condition is true, print some text:
int time = 20;
if (time < 18) {
printf("Good day.");
} else
{
printf("Good evening.");
}
// Outputs "Good evening."
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Definition and Usage
The if statement specifies a block of code to be executed if a condition is true.
C has the following conditional statements:
- Use
ifto specify a block of code to be executed, if a specified condition is true - Use
elseto specify a block of code to be executed, if the same condition is false - Use
else ifto specify a new condition to test, if the first condition is false - Use
switchto specify many alternative blocks of code to be executed
More Examples
Example
Use the if statement to test variables:
int x = 20;
int y = 18;
if (x > y) {
printf("x is greater
than y");
}
Try it Yourself »
Related Pages
Read more about if statements in our C If...Else Tutorial.
