C If ... Else Examples
Real-Life Examples
This example shows how you can use if..else to "open a door" if the user
enters the correct code:
Example
int doorCode = 1337;
if (doorCode == 1337) {
printf("Correct
code.\nThe door is now open.");
} else {
printf("Wrong code.\nThe
door remains closed.");
}
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This example shows how you can use if..else
to find out if a number is positive or negative:
Example
int myNum = 10; // Is this a positive or negative number?
if (myNum >
0) {
printf("The value is a positive number.");
} else if (myNum
< 0) {
printf("The value is a negative number.");
} else {
printf("The value is 0.");
}
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Yourself »
Find out if a person is old enough to vote:
Example
int myAge = 25;
int votingAge = 18;
if (myAge >= votingAge) {
printf("Old enough to vote!");
} else {
printf("Not old enough
to vote.");
}
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Find out if a number is even or odd:
Example
int myNum = 5;
if (myNum % 2 ==
0) {
printf("%d is even.\n",
myNum);
} else {
printf("%d is odd.\n", myNum);
}
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Yourself »