13 - Basic Arithmetic with Integer Variables in Java

Learn about Java variables and arithmetic operations. We will learn how to use integers to calculate quantities by assigning values and performing math operations on the varialbes.

[GeorgiosMichalopoulos]

Amazing lesson! Many thanks for making this freely available!

[robloxvempor]

Helped 👍🏽 I’m watching all you videos so I can complete my programs due tomorrow 🙃

[trianglesupreme]

It would have been more helpful if you explained how the decimal point is lost. Does JAVA choose the closest integer to the decimal number or what?
PS:
1. JAVA does floored division (i.e. rounding towards zero). Eg. 100/27 (=3.7) is stored as 3 in int variable.
2. Repeatedly add the digits in a number until a single digit remains using: int digSum = num - 9*((num-1)/9);

[dennlly]

How to code this
Enter·the·2-digit·integer:·34
Product·of·3·and·4·=·12

[nicolasjoye]

I do not come around with the following error statement:
"Error: Main method is not static in class Lesson13, please define the main method as:
public static void main(String[] args)"
Can you help me?
Thx