Tag Archives: int

Python || Simple Math Using Int & Float

This page will display the use of int and float data types. Since python is a flexible programming language, variable data types do not need to be explicitly declared like in C/C++/Java, but they still exist within the grand scheme of things.

==== ADDING TWO NUMBERS TOGETHER ====

To add two numbers together, you will have to first declare your variables by doing something like this.


Notice in lines 6-8, I declared my variables, giving them a name. You can name your variables anything you want, with a rule of thumb as naming them something meaningful to your code (i.e avoid giving your variables arbitrary names like “x” or “y”). In line 16 the actual math process is taking place, storing the sum of “num1” and “num2” in a variable called “total.” I also initialized my variables to zero. You should always initialize your variables before you use them.

the resulting code should give you the following output:

Please enter the first number: 25
Please enter the second number: 1
The sum of 25 and 1 is: 26

==== SUBTRACTING TWO NUMBERS ====

Subtracting two ints works the same way as the above code, and we would only need to edit the above code in one place to achieve that. In line 16, replace the addition symbol with a subtraction sign, and you should have something like this


The above code should give you the following output

Please enter the first number: 25
Please enter the second number: 1
The difference between 25 and 1 is: 24

==== MULTIPLYING TWO NUMBERS ====

This can be achieved the same way as the 2 previous methods, simply by editing line 16, and replacing the designated math operator with the star symbol “*.”


The above code should give you the following output

Please enter the first number: 8
Please enter the second number: 24
The product of 8 and 24 is: 192

==== DIVIDING TWO NUMBERS TOGETHER ====

This one is a little different from the other three. Before we would use int variables to store our data. In division, when you divide numbers together, sometimes they end in decimals. Int data types can not store decimal data (try it yourself and see), so here is where we use the float data type.

The resulting code will basically be the same as the other previous three, only instead of our variables being of type int within the print statement, they will be of type float.


The above code should give the following output

Please enter the first number: 1
Please enter the second number: 25
The quotient of 1 and 25 is: 0.040000

==== MODULUS ====

If you wanted to capture the remainder of the quotient you calculated from the above code, you would use the modulus operator (%).

From the above code, you would only need to edit line 16, from division, to modulus.


The above code should give the following output

Please enter the first number: 1
Please enter the second number: 25
1 mod 25 is: 1

Java || Find The Average Using an Array – Omit Highest And Lowest Scores

This page will consist of two programs which calculates the average of a specific amount of numbers using an array.

REQUIRED KNOWLEDGE FOR BOTH PROGRAMS

Double Data Type
Final Variables
Arrays
For Loops
Assignment Operators
Basic Math - How To Find The Average

====== FIND THE AVERAGE USING AN ARRAY ======

The first program is fairly simple, and it was used to introduce the array concept. The program prompts the user to enter the total amount of numbers they want to find the average for, then the program displays the answer to them via stdout.


QUICK NOTES:
The highlighted lines are sections of interest to look out for.

ARRAY
Notice the array declaration on line #13. The type of array being used in this program is a dynamic array, which has the ability to store up to 100 integer elements in the array. You can change the number of elements its able to store to a higher or lower number if you wish.

FOR LOOP
Lines 27-32 contains a for loop, which is used to actually store the data inside of the array. Without some type of loop, it is virtually impossible for the user to input data into the array; that is, unless you want to add 100 different println statements into your code asking the user to input data. Line 31 uses the assignment operator “+=” which gives us a running total of the data that is being inputted into the array. Note the loop only stores as many elements as the user so desires, so if the user only wants to input 3 numbers into the array, the for loop will only execute 3 times.

Once compiled, you should get this as your output:

Welcome to My Programming Notes' Java Program.

How many numbers do you want to find the average for?: 4
Enter value #1: 21
Enter value #2: 24
Enter value #3: 19
Enter value #4: 17
The average of the 4 numbers is 20.25

====== FIND THE AVERAGE – OMIT HIGHEST AND LOWEST SCORES ======

The second program is really practical in a real world setting. We were asked to create a program for a fictional competition which had 6 judges. The 6 judges each gave a score of the performance for a competitor in a competition, (i.e a score of 1-10), and we were asked to find the average of those scores, omitting the highest/lowest results. The program was to store the scores into an array, display the scores back to the user via stdout, display the highest and lowest scores among the 6 obtained, display the average of the 6 scores, and finally display the average adjusted scores omitting the highest and lowest result.


QUICK NOTES:
The highlighted lines are sections of interest to look out for.

FINAL
A final variable was declared and used to initialize the array (line 7). This was used to initialize the size of the array.

FOR LOOPS
Once again loops were used to traverse the array, as noted on lines 24, 51 and 73. The final variable was also used within the for loops, making it easier to modify the code if its necessary to reduce or increase the number of available judges.

HIGHEST/LOWEST SCORES
This is noted on lines 35-45, and it is really simple to understand the process once you see the code.

OMITTING HIGHEST/LOWEST SCORE
Lines 73-81 highlights this process. The loop basically traverses the array, skipping over the highest/lowest elements.

Once compiled, you should get this as your output

Welcome to My Programming Notes' Java Program.

Judges, enter one score each for
the current competitor: 123 453 -789 2 23345 987

These are the scores from the 6 judges:
The score for judge #1 is: 123.0
The score for judge #2 is: 453.0
The score for judge #3 is: -789.0
The score for judge #4 is: 2.0
The score for judge #5 is: 23345.0
The score for judge #6 is: 987.0

These are the highest and lowest scores:
Highest: 23345.0
Lowest: -789.0
The average score is: 4020.1666666666665
The average adjusted score omitting the highest and lowest result is: 391.25

C++ || Snippet – How To Find The Minimum & Maximum Of 3 Numbers, Print In Ascending Order

This page will demonstrate how to find the minimum and maximum of 3 numbers. After the maximum and minimum numbers are obtained, the 3 numbers are displayed to the screen in ascending order.

This program uses multiple if-statements to determine equality, and uses 3 seperate int varables to store its data. This program is very basic, so it does not utilize an integer array, or any sorting methods.

NOTE: If you want to find the Minimum & Maximum of numbers contained in an integer array, click here.


QUICK NOTES:
The highlighted lines are sections of interest to look out for.

The code is heavily commented, so no further insight is necessary. If you have any questions, feel free to leave a comment below.

Once compiled, you should get this as your output

Please enter 3 numbers: 89 56 1987
The numbers you just entered are: 89 56 1987

The maximum number is: 1987
The minimum number is: 56
The numbers in order are: 56 89 1987

C++ || Snippet – How To Reverse An Integer Using Modulus & While Loop

This page will consist of a simple program which demonstrates how to reverse an integer (not an int array) using modulus and a while loop.

REQUIRED KNOWLEDGE FOR THIS SNIPPET

Functions
Modulus
While Loops


QUICK NOTES:
The highlighted lines are sections of interest to look out for.

The code is heavily commented, so no further insight is necessary. If you have any questions, feel free to leave a comment below.

Once compiled, you should get this as your output
(Note: the code was compiled three separate times to display different output)

==== RUN #1 ====

Enter a number: 2012
2012 reversed is: 2102

==== RUN #2 ====

Enter a number: 1987
1987 reversed is: 7891

==== RUN #3 ====

Enter a number: 241
241 reversed is: 142

C++ || Simple Math Using Int & Float

This page will display the use of int and float data types. Note: you can (obviously) add as many int’s together as you wish, not just two.

==== ADDING TWO NUMBERS TOGETHER ====

To add two numbers together, you will have to first declare your variables by doing something like this.


Notice in lines 5-7, I declared my variables, giving them a name. You can name your variables anything you want, with a rule of thumb as naming them something meaningful to your code (i.e avoid giving your variables arbitrary names like “x” or “y”). In line 15 the actual math process is taking place, storing the sum of “num1” and “num2” in a variable called “sum.” I also initialized my variables to zero. You should always initialize your variables.

the resulting code should give you the following output:

Please enter the first number: 8
Please enter the second number: 24
The sum of 8 and 24 is: 32

==== SUBTRACTING TWO NUMBERS ====

Subtracting two ints works the same way as the above code, and we would only need to edit the above code in one place to achieve that. In line 15, replace the addition symbol with a subtraction sign, and you should have something like this


The above code should give you the following output

Please enter the first number: 8
Please enter the second number: 24
The difference between 8 and 24 is: -16

==== MULTIPLYING TWO NUMBERS ====

This can be achieved the same way as the 2 previous methods, simply by editing line 15, and replacing the designated math operator with the star symbol “*.”


The above code should give you the following output

Please enter the first number: 8
Please enter the second number: 24
The product of 8 and 24 is: 192

==== DIVIDING TWO NUMBERS TOGETHER ====

This one is a little different from the other three. Before we would use int variables to store our data. In division, when you divide numbers together, sometimes they end in decimals. Int data types can not store decimal data (try it yourself and see), so here is where we use the float data type (you can also use the “double” data type here aswell).

So the resulting code will basically be the same as the other previous three, only instead of our variables being of type int, they will be of type float.


The above code should give the following output

Please enter the first number: 8
Please enter the second number: 24
The quotient of 8 and 24 is: 0.333333

==== MODULUS ====

If you wanted to capture the remainder of the quotient you calculated from the above code, you would use the modulus operator (%).

From the above code, you would only need to edit line 15, from division, to modulus.


The above code should give the following output

Please enter the first number: 24
Please enter the second number: 8
The remainder of 24 and 8 is: 0