What is Pseudocode
Pseudocode is a compact and informal high-level description of a program using the conventions of a programming language, but intended more for humans.
Pseudocode is not an actual programming language. So it cannot be compiled into an executable program. It uses short terms or simple English language syntaxes to write code for programs before it is actually converted into a specific programming language.
And there is no pseudocode standard syntax and so at times it becomes slightly confusing when writing Pseudocode and so let us understand pseudo code with an example.
- INPUT – indicates a user will be inputting something
- OUTPUT – indicates that an output will appear on the screen
- WHILE – a loop (iteration that has a condition at the beginning)
- FOR – a counting loop (iteration)
- REPEAT – UNTIL – a loop (iteration) that has a condition at the end
- IF – THEN – ELSE – a decision (selection) in which a choice is made
- any instructions that occur inside a selection or iteration are usually indented
Some Keywords That Should be Used
For looping and selection, The keywords that are to be used include Do While…EndDo; Do Until…Enddo; Case…EndCase; If…Endif; Call … with (parameters); Call; Return ….; Return; When; Always use scope terminators for loops and iteration.As verbs, use the words Generate, Compute, Process, etc. Words such as set, reset, increment, compute, calculate, add, sum, multiply, … print, display, input, output, edit, test , etc. with careful indentation tend to foster desirable pseudocode.
Do not include data declarations in your pseudocode.
Pseudocode Examples ( Algorithms Examples in Pseudocode )
There are 18 pseudocode tutorial in this post. The Pseudocode examples go from beginner to advanced. You will find a lot of for loop, if else and basics examples. Pseudocode and flowchart examples are in following the post.
Pseudocode Example 1: Add Two Numbers.(Simple Pseudocode Example)
|
1 2 3 4 5 6 7 8 9 |
BEGIN NUMBER s1, s2, sum OUTPUT("Input number1:") INPUT s1 OUTPUT("Input number2:") INPUT s2 sum=s1+s2 OUTPUT sum END |
Flowchart of Pseudocode
Pseudocode Example 2: Calculate Area and Perimeter of Rectangle (Simple Pseudocode Example)
|
1 2 3 4 5 6 7 8 9 |
BEGIN NUMBER b1,b2,area,perimeter INPUT b1 UNPUT b2 area=b1*b2 perimeter=2*(b1+b2) OUTPUT alan OUTPUT perimeter END |
Flowchart of Pseudocode
Pseudocode Example 3: Find Area and Perimeter of a Square (Simple Pseudocode Example)
|
1 2 3 4 5 6 7 8 |
BEGIN NUMBER len, area,perimeter INPUT len area = len*len perimeter = len*4 OUTPUT area OUTPUT perimeter END |
Pseudocode Example 4: Find Area Of Circle using Radius (Simple Pseudocode Example)
|
1 2 3 4 5 6 |
BEGIN NUMBER r, area INPUT r area=3.14*r*r OUTPUT area END |
Flowchart of Pseudocode
Pseudocode Example 5: Find Perimeter Of Circle using Radius (Simple Pseudocode Example)
|
1 2 3 4 5 6 |
BEGIN NUMBER r, perimeter INPUT r perimeter=2*3.14*r OUTPUT perimeter END |
Flowchart of Pseudocode
Pseudocode Example 6: Calculate sales taxes (Simple Pseudocode Example)
|
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 |
BEGIN NUMBER price, tax, taxRate, total OUTPUT "Enter Product Price" INPUT price OUTPUT "Enter tax rate amoung 1 and 100" OKU taxRate tax= price* taxRate/100 total= price + tax OUTPUT "Product tax="+tax OUTPUT "Product total price ="+total END |
Flowchart of Pseudocode
Pseudocode Example 7: Solve Quadratic Equation
(Pseudocode If Else Example)
|
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 |
BEGIN NUMBER a, b, c, d, x1, x2 INPUT a,b,c d = b^2-4ac IF (d >= 0) THEN x1 = (-b+√d)/2a yada x1 = (-b+d^(1/2)/2a x2 = (-b-√d)/2a yada x2 = (-b-d^(1/2)/2a OUTPUT "ROOT 1:"+x1 OUTPUT "ROOT 2:"+x2 ELSE IF (d == 0) THEN x1=x2= -b/2a OUTPUT "ROOT 1:"+x1 OUTPUT "ROOT 2:"+x2 ELSE OUTPUT "There is no real root" ENDIF END |
Flowchart of Pseudocode
Pseudocode Example 8: issue for driver licence (Pseudocode If Else Example)
|
1 2 3 4 5 6 7 8 9 10 11 12 13 |
BEGIN NUMBER age INPUT "Enter your age for driving licence" OUTPUT age IF age>=16 THEN OUTPUT "You can take driving licence" ELSE OUTPUT "You can't take driving licence" ENDIF END |
Flowchart of Pseudocode
Pseudocode Example 9: Check a Number is Positive or Negative (Pseudocode If Else Example)
|
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 |
BEGIN NUMBER num OUTPUT "Enter a Number" OKU num IF num>0 THEN OUTPUT "Entered number is positive" ELSE IF num <0 THEN OUTPUT "Entered number is negative" ELSE OUTPUT "Entered number is zero" ENDIF END |
Flowchart of Pseudocode
Pseudocode Example 10: Find the biggest of three (3) Numbers (Pseudocode If Else Example)
|
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 |
BEGIN NUMBER num1,num2,num3 INPUT num1 INPUT num2 INPUT num3 IF num1>num2 AND num1>num3 THEN OUTPUT num1+ "is higher" ELSE IF num2 > num3 THEN OUTPUT num2 + "is higher" ELSE OUTPUT num3+ "is higher" ENDIF END |
Flowchart of Pseudocode
Pseudocode Example 11: Print Numbers from 1 to 100. (Pseudocode For Loop Example)
|
1 2 3 4 5 6 7 8 |
BEGIN NUMBER counter FOR counter = 1 TO 100 STEP 1 DO OUTPUT counter ENDFOR END |
Flowchart of Pseudocode
Pseudocode Example 12: Find Sum of Natural Numbers (1 to 100). (Pseudocode For Loop Example)
|
1 2 3 4 5 6 7 8 9 10 |
BEGIN NUMBER counter, sum=0 FOR counter=1 TO 100 STEP 1 DO sum=sum+counter ENDFOR OUTPUT sum END |
Pseudocode Example 13: Read 50 numbers and find their sum and average. (Pseudocode For Loop Example)
|
1 2 3 4 5 6 7 8 9 10 11 12 13 |
BEGIN NUMBER counter, sum=0, num FOR counter=1 TO 50 STEP counter DO OUTPUT "Enter a Number" INPUT num sum=sum+num ENDFOR OUTPUT sum END |
Flowchart of Pseudocode
Pseudocode Example 14: Read 10 numbers and find sum of even numbers. (Pseudocode For Loop Example)
|
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 |
BEGIN NUMBER counter, sum=0, num FOR counter=1 TO 10 STEP 1 DO OUTPUT "Enter a Number" INPUT num IF num % 2 == 0 THEN sum=sum+num ENDIF ENDFOR OUTPUT sum END |
Flowchart of Pseudocode
Pseudocode Example 15: Find the sum of all elements of array. (Pseudocode For Loop Example)
|
1 2 3 4 5 6 7 8 9 10 |
BEGIN NUMBER i=0, n=5, sum=0 ARRAY numbers={65,45,10,7,125} FOR i=0 TO n-1 STEP 1 DO sum = sum + numbers[i] ENDFOR OUTPUT "Sum of numbers in the array"+sum END |
Flowchart of Pseudocode
Pseudocode Example 16: Calculate square of a number (Simple Pseudocode Example)
Alternative 1:
|
1 2 3 4 5 6 7 8 9 10 |
BEGIN NUMBER num, result OUTPUT "Enter a number for calculate the power of the number" INPUT num result=num*num OUTPUT "Power of the Number:" + result END |
Alternative 2:
|
1 2 3 4 5 6 7 8 9 10 11 12 13 |
BEGIN NUMBER num, result=0,counter OUTPUT "Enter a number for calculate the power of the number" INPUT num FOR counter=0 TO num-1 STEP 1 DO result +=num ENDFOR OUTPUT "Power of the Number:" + result END |
Pseudocode Example 17: Calculate the Square Root of a Number (Pseudocode For Loop Example)
|
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 |
BEGIN NUMBER root=1, counter=0,num OUTPUT "Enter a number for calculate the root" INPUT num WHILE sayac < sayi+1 THEN i=i+1 root=(num/root+root)/2 END WHILE OUTPUT root END |
Pseudocode Example 18: Swap two variables with using a temporary variable (Simple Pseudocode Example)
|
1 2 3 4 5 6 7 8 9 10 11 12 13 14 |
BEGIN NUMBER a,b,c a=10, b=20 OUTPUT "Value of a :"+a OUTPUT "Value of b :"+b c=a a=b b=c OUTPUT "Value of a :"+a OUTPUT "Value of b :"+b END |
Pseudocode Example 19: Swap two variables without using a temporary variable (Simple Pseudocode Example)
|
1 2 3 4 5 6 7 8 9 10 11 12 13 14 |
BEGIN NUMBER a,b a=10, b=20 OUTPUT "Value of a :"+a OUTPUT "Value of b :"+b a=a+b b=a-b a=a-b OUTPUT "Value of a :"+a OUTPUT "Value of b :"+b END |
Pseudocode Example 20: Print Numbers from 1 to n. (Pseudocode For Loop Example)
|
1 2 3 4 5 6 7 8 |
BEGIN NUMBER counter,n INPUT n FOR counter = 1 TO n STEP 1 DO OUTPUT counter ENDFOR END |
Pseudocode Example 21: Calculate the Sum and Average of n Number. (Pseudocode For Loop Example)
|
1 2 3 4 5 6 7 8 9 10 |
BEGIN NUMBER counter,n,sum,avg INPUT n FOR counter = 1 TO n STEP 1 DO sum=sum+counter ENDFOR avg=sum/n OUTPUT "Sum of numbers :"+sum OUTPUT "Average of numbers :"+avg END |
Pseudocode Example 22: Design the algorithm and flowchart that finds and display the larger of the two numbers given different from each other.
|
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 |
BEGIN Number n1,n2 Input n1 Input n2 IF (n1>n2) THEN OUTPUT(n1+" is higher") ELSE IF(n2>n1) OUTPUT(n2+" is higher") ELSE OUTPUT("n1=n2") END IF END |
Pseudocode Example 23: Perform the application that calculates the area of the triangle whose height and base length entered by the keyboard.
|
1 2 3 4 5 6 7 8 9 10 11 |
BEGIN Number b,h ,area Input b Input h area=(b*h)/2 OUTPUT (Area of Triangle is "+area) END |
Pseudocode Example 24: The voltage (V) between the poles of a conductor is equal to the product of the current (I) passing through the conductor and the resistance (R) present on the conductor. It’s demonstrated by the V = I * R formula. What is the algorithm of the program that calculates the voltage between the poles of the conductor by using the formula according to the current and resistance values entered by the user.
|
1 2 3 4 5 6 7 |
BEGIN Number i,r,v Input i Input r v=i*r OUTPUT (v) END |
Pseudocode Example 25: What is the algorithm that the number entered by the user from the keyboard fully divided if it is divided into 3 and 5 .
|
1 2 3 4 5 6 |
BEGIN Number num Input num IF(num%3==0 AND num%5==0) OUTPUT(num+ " is divided into 3 and 5") END |
Thanks.
can the pseudocode program be executed in html through notepad?
if not then please suggest where can i try this code program
Pseudocode is not a Real program. It is an approach of programming. You can write working program with programming language as Java, php, Python etc.
This post will help you about diffrence of pseudocode from programming languages.
https://www.code4example.com/pseudocode/pseudocode-to-calculate-area-and-perimeter-of-rectangle/#
nadkhulaaaaaaaa