If and if-else statements in programming allow for conditional execution of code. If statements execute code if a condition is true, while if-else statements execute one block of code if the condition is true and another block if the condition is false. Examples are provided of using if to print a message if a variable is less than 10, and using if-else to determine and print whether an input number is even or odd.

1. กF If, If-Else
ก ก กก

2. กF If, If-Else
ก ก F F
F Fก F
Fก F F ก ก

3. ก F กF if F

4. 1 F if F
if (expression)
{
statement 1;
statement 2;
}
F
int x=5;
if (x<10)
{
printf("x is less than 10n");
}

5. 2 F if–else
if (expression)
{
statement 1;
statement 2;
}
else
{
statement 3;
statement 4;
}

6. 2 F if–else
F
int your_number;
printf("Enter a whole number: ");
scanf("%d",&your_number);
if (your_number % 2 == 0)
{
printf("Your number is evenn");
}
else
{
printf("Your number is oddn");
}