Conditional statements check an expression and execute statements depending on the result. There are three main types: IF-THEN statements execute statements if a condition is true; IF-THEN-ELSE statements choose between two alternatives depending on if a condition is true or false; and nested/ladderized IF-THEN-ELSE statements have multiple conditions and outcomes. Sample problems demonstrate using conditional statements to check grades, prices, ages, colors, school levels, and temperatures.

1. Conditional Statement

2. Conditional StatementsAre statements that check an expression then may or may not execute a statement or group of statement depending on the result of the condition.

3. TYPESIF-THEN STATEMENTIF-THEN-ELSE STATEMENTLADDERIZED IF-THEN-ELSE STATEMENT

4. IF-THEN STATEMENTIt specifies that a certain statement will be executed only if the expression is true

5. SYNTAXIF condition THEN expression

6. ExampleIF the telephone is ringing THENanswer the telephone

7. RELATIONAL OPERATIONS=><>=<=

8. SAMPLE PROBLEMS

9. Write a program that will output “Congratulations!” if the student’s grade is greater than or equal 75.

10. RemClearInput GIF G>=75 THEN Print “Congratulations!”End

11. Write a program that will ask for a price. If the price is greater than 1000, compute a 10% discount from the original price. Display the computed discount.

12. ClearInput PIf P>1000 THEN d=P*.1Print dEnd

13. IF-THEN-ELSE Statement It allows the computer to choose one of the given two alternatives.

14. SYNTAXIF condition THEN expression1 ELSE expression2

15. SAMPLE PROBLEMS

16. Write a program to print for the sum of two numbers if the first no. is greater than the second no., otherwise print their difference

17. REMClearInput x,yIf x>y THEN S=x+y: Print SELSED=x-y : Print DEnd

18. Write a program that determines if the input age is qualified to vote or not. If qualified, displays “Qualified to Vote!” if not displays “Too Young!” We know that a qualifying age is 18 yrs. old and above.

19. REMClearInput AIf A>=18 THEN Print “Qualified to vote!”ELSE Print “Too Young!”End

20. NESTED IF or LADDERIZED IF-THEN-ELSE Statementis used if there are three or more possible conditions and outcomes to be executed.

21. SYNTAXIF condition1 THENExpression1ELSE IF condition2 THENExpression NELSEExpression

22. SAMPLE PROBLEMS

23. Write a program that displays an equivalent color once an input letter matches its first character for example b is for blue, r for red and so on. Here is the given criteria.

24. REMClearInput xIF x=b THEN Print “Blue”ELSE IF x=r THEN Print “Red”ELSE IF x=g THEN Print “Green”ELSE IF x=y THEN Print “Yellow”ELSE Print “Unknown Color!”

25. ASSIGNMENT

26. Write a program to display the high school level of a student, based on its year entry number for example the year-entry 1 means the student is a freshmen, 2 for sophomore, and so on. Here are the given criteria:Year-Entry Number High School Level 1 Freshmen 2 Sophomore 3 Junior 4 Senior Other Entry No. Out-of-School

27. Write a program that examine the value of a variable called temp. then display the following messages depending on the value assigned to the temp.Temperature Message Less than 0 ICEBetween 0 and 100 Water Exceeds 100 STEAM

28. T. O. L.