C Programming Code Examples
C > If Else and Switch Case Code Examples
if...else statement - check whether an integer entered by the user is odd or even
/* if...else statement - check whether an integer entered by the user is odd or even
The if...else statement executes some code if the test expression is true (nonzero) and some other code if the test expression is false (0).
Syntax of if...else */
if (testExpression) {
// codes inside the body of if
}
else {
// codes inside the body of else
}
// If test expression is true, codes inside the body of if statement is executed and, codes inside the body of else statement is skipped.
// If test expression is false, codes inside the body of else statement is executed and, codes inside the body of if statement is skipped.
// Program to check whether an integer entered by the user is odd or even
#include <stdio.h>
int main()
{
int number;
printf("Enter an integer: ");
scanf("%d",&number);
// True if remainder is 0
if( number%2 == 0 )
printf("%d is an even integer.",number);
else
printf("%d is an odd integer.",number);
return 0;
}
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The if...else statement executes two different codes depending upon whether the test expression is true or false. Sometimes, a choice has to be made from more than 2 possibilities. The if...else ladder allows you to check between multiple test expressions and execute different statements. In C/C++ if-else-if ladder helps user decide from among multiple options. The C/C++ if statements are executed from the top down. As soon as one of the conditions controlling the if is true, the statement associated with that if is executed, and the rest of the C else-if ladder is bypassed. If none of the conditions is true, then the final else statement will be executed.
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