Selection Statement in C programming
C if Selection Statement
The if statement is called a single-selection statement because it selects or ignores a single action. The if selection statement either selects an action if a condition is true or skips the action if the condition is false.
#include <stdio.h>
// function main begins program execution
int main( void ) {
int num1; // first number to be read from user
int num2; // second number to be read from user
printf( "Enter two integers: " );
scanf( "%d%d", &num1, &num2 ); // read two integers
if ( num1 == num2 ) {
printf( "%d is equal to %d\n", num1, num2 );
} // end if
if ( num1 != num2 ) {
printf( "%d is not equal to %d\n", num1, num2 );
} // end if
if ( num1 < num2 ) {
printf( "%d is less than %d\n", num1, num2 );
} // end if
if ( num1 > num2 ) {
printf( "%d is greater than %d\n", num1, num2 );
} // end if
if ( num1 <= num2 ) {
printf( "%d is less than or equal to %d\n", num1, num2 );
} // end if
if ( num1 >= num2 ) {
printf( "%d is greater than or equal to %d\n", num1, num2 );
} // end if
} // end function main
Output:
Enter two integers: 5 10
5 is not equal to 10
5 is less than 10
5 is less than or equal to 10
C if else Selection Statement
The if else selection statement allows you to specify that different actions are to be performed when the condition is true and when it’s false.
#include <stdio.h>
int main(void) {
initialize variables in definitions //
int result; // exam result
// prompt user for input and obtain value from user
printf("%s", "Enter result ( 1=pass,2=fail ): ");
scanf("%d", &result);
// if result 1passes
if (result == 1) {
printf("Passed \n");
}
else { // otherwise failures
printf("Failed \n");
} end else
} // end function main
Output:
Enter result (1=pass,2=fail) : 1
Passed
or the else action
Enter result (1=pass,2=fail) : 2
Failed
Ads Right
