Conditionals

Problem:

Write a program to determine if a number is positive, negative, or zero.

Example Output:

Algorithm CheckSign
    var number = Input "Enter a number:"
    
    If number > 0 Then
        Print "The number is positive"
    Elseif number < 0 Then
        Print "The number is negative"
    Else
        Print "The number is zero"
    Endif
Endalgorithm

Problem:

Determine if a student passes or fails based on their score (passing score is 60 or above).

Algorithm GradeChecker
    var score = Input "Enter your score:"
    
    If score >= 60 Then
        Print "Result: Pass"
    Else
        Print "Result: Fail"
    Endif
Endalgorithm

Problem:

Find the largest of three numbers.

Algorithm FindLargest
    var a = Input "Enter first number:"
    var b = Input "Enter second number:"
    var c = Input "Enter third number:"
    
    var largest = a
    
    If b > largest Then
        largest = b
    Endif
    
    If c > largest Then
        largest = c
    Endif
    
    Print "The largest number is:", largest
Endalgorithm

Problem:

Categorize age as Child (<13), Teen (13-19), Adult (20-64), or Senior (65+).

Algorithm AgeCategory
    var age = Input "Enter age:"
    
    If age < 13 Then
        Print "Category: Child"
    Elseif age <= 19 Then
        Print "Category: Teen"
    Elseif age <= 64 Then
        Print "Category: Adult"
    Else
        Print "Category: Senior"
    Endif
Endalgorithm

Problem:

Determine if a year is a leap year (divisible by 4, but not by 100 unless also by 400).

Algorithm LeapYearChecker
    var year = Input "Enter year:"
    
    If (year mod 400 == 0) Then
        Print year, "is a leap year"
    Elseif (year mod 100 == 0) Then
        Print year, "is not a leap year"
    Elseif (year mod 4 == 0) Then
        Print year, "is a leap year"
    Else
        Print year, "is not a leap year"
    Endif
Endalgorithm

Problem:

Convert a numerical grade to letter grade (A: 90-100, B: 80-89, C: 70-79, D: 60-69, F: <60).

Algorithm GradeLetter
    var grade = Input "Enter grade:"
    
    If grade >= 90 Then
        Print "Letter Grade: A"
    Elseif grade >= 80 Then
        Print "Letter Grade: B"
    Elseif grade >= 70 Then
        Print "Letter Grade: C"
    Elseif grade >= 60 Then
        Print "Letter Grade: D"
    Else
        Print "Letter Grade: F"
    Endif
Endalgorithm

Problem:

Check if three sides can form a valid triangle (sum of any two sides must be greater than the third).

Algorithm TriangleValidator
    var a = Input "Enter side 1:"
    var b = Input "Enter side 2:"
    var c = Input "Enter side 3:"
    
    If (a + b > c) AND (b + c > a) AND (a + c > b) Then
        Print "These sides form a valid triangle"
    Else
        Print "These sides do NOT form a valid triangle"
    Endif
Endalgorithm

Problem:

Check if someone can vote (age >= 18 AND citizen = true).

Algorithm VotingEligibility
    var age = Input "Enter age:"
    var citizen = Input "Are you a citizen? (yes/no):"
    
    If (age >= 18) AND (citizen == "yes") Then
        Print "You are eligible to vote"
    Else
        Print "You are NOT eligible to vote"
    Endif
Endalgorithm

Problem:

Use nested IF statements to check age eligibility for different licenses (16+ for car, 18+ for motorcycle with car license).

Algorithm LicenseChecker
    var age = Input "Enter age:"
    var hasCarLicense = Input "Have car license? (yes/no):"
    
    If age >= 16 Then
        Print "You can drive a car"
        
        If (age >= 18) AND (hasCarLicense == "yes") Then
            Print "You can get motorcycle license"
        Else
            Print "You cannot get motorcycle license yet"
        Endif
    Else
        Print "You cannot drive yet"
    Endif
Endalgorithm

Problem:

Calculate final price with tiered discounts: VIP members get 20%, regular members get 10%, purchases over $100 get extra 5%.

Algorithm DiscountSystem
    var amount = Input "Enter purchase amount:"
    var membership = Input "Membership (VIP/Regular/None):"
    
    var discountPercent = 0
    
    If membership == "VIP" Then
        discountPercent = 20
        Print "Base discount: 20%"
    Elseif membership == "Regular" Then
        discountPercent = 10
        Print "Base discount: 10%"
    Endif
    
    If amount > 100 Then
        discountPercent = discountPercent + 5
        Print "Large purchase bonus: 5%"
    Endif
    
    var finalPrice = amount - (amount * discountPercent / 100)
    
    Print "Total discount:", discountPercent, "%"
    Print "Final price:", finalPrice
Endalgorithm