The Basics

• Finding the max of two number?


  Start

  Input num1

  Input num2

  If num1 > num2 then

  Set max = num1

  else

  Set max = num2

  Display max

  Stop
• Calculate the factorial of a given number?

  Start

  Input num

  Set factorial = 1

  set i = 1

  while i <= num do

  set factorial = factorial *i

  set i = i + 1

  display factorial

  stop
• Determine wether a given number is prime or not?


  Start

  Input num

  Set is_prime = true

  If num <= 1 then

  set is_prime = false

  set i = 2

  while i * i <= num and is_prime - true do

  if num % i == 0 then

  set is_prime = false

  set i + i + 1

  If is_prime = true then

  PRINT(”is prime“

  else

  PRINT(It is not prime)

  stop
• Arrays?

  // Declare an array of integers

  INTEGER_ARRAY = [5, 10, 3, 8, 15, 2]

  // Initialize variables to store maximum and minimum values

  MAX_VALUE = INTEGER_ARRAY[0]

  MIN_VALUE = INTEGER_ARRAY[0]

  // Iterate through the array to find maximum and minimum values

  FOR i = 1 to LENGTH(INTEGER_ARRAY) - 1 DO

  IF INTEGER_ARRAY[i] > MAX_VALUE THEN

  MAX_VALUE = INTEGER_ARRAY[i]

  ENDIF

  IF INTEGER_ARRAY[i] < MIN_VALUE THEN

  MIN_VALUE = INTEGER_ARRAY[i]

  ENDIF

  ENDFOR

  // Display the maximum and minimum values

  PRINT("Maximum value:", MAX_VALUE)

  PRINT("Minimum value:", MIN_VALUE)
• Iteration?

  // Input a positive integer N

  N = INPUT("Enter a positive integer N")

  // Initialize a variable to store the sum

  SUM = 0

  // Iterate from 1 to N and add each number to the sum

  FOR i = 1 to N DO

  SUM = SUM + i

  ENDFOR

  // Display the sum

  PRINT("The sum of numbers from 1 to", N, "is:", SUM)
• Function to calculate the area of a rectangle

  1. Calculate area

  2. Return area
• Function to calculate the perimeter of a rectangle

  1. Calculate perimeter

  2. Return perimeter
• Input length and width of the rectangle

  1. Enter the length of the rectangle

  2. Enter the width of the rectangle
• Call functions to calculate area and perimeter

  1. CalculateArea(length, width)

  2. CalculatePerimeter(length, width)
• Display results

  1. Print "The area of the rectangle is:", area

  2. Print "The perimeter of the rectangle is:", perimeter
• Recursion?

  // Recursive function to calculate the factorial of a non-negative integer

  Function CalculateFactorial(n):

  If n equals 0 then

  Return 1 // Base case: factorial of 0 is 1

  Else

  Return n * CalculateFactorial(n - 1) // Recursive call

  EndIf

  // Input a non-negative integer

  num = INPUT("Enter a non-negative integer")

  // Call the recursive function to calculate factorial

  factorial = CalculateFactorial(num)

  // Display the factorial

  PRINT("The factorial of", num, "is:", factorial)
• NUMBER_LIST

  An empty list to store numbers
• CalculateAverage(numbers)

  1. Initialize total to 0

  2. For each number in numbers, add it to total

  3. Divide total by length of numbers to get average

  4. Return average
• Inputting and adding numbers to NUMBER_LIST

  1. Input the number of elements in the list

  2. For i = 1 to num_elements, input number i and append it to NUMBER_LIST
• Calculating and displaying the average

  1. Call CalculateAverage(NUMBER_LIST) to get the average

  2. Print the average
• Bubble sort algorithm to sort an array of integers

  1. Determine length of array

  2. Iterate through array

  3. Compare adjacent elements

  4. Swap elements if in wrong order
• Linear search algorithm to find a target value in an array of integers

  1. Determine length of array

  2. Iterate through array

  3. Check if current element matches target

  4. Return index if found

  5. Return -1 if not found
• Example usage

  • arr = [5, 3, 8, 2, 1, 9]
  • target = 8
• Sort the array using bubble sort

  BubbleSort(arr)
• Search for the target value using linear search

  index = LinearSearch(arr, target)
• Target value found

  Print "Target value [target] found at index [index]"
• Target value not found

  Print "Target value [target] not found in the array"