JOptionPane

Question

Can someone teach me how to use JOptionPane with loop and the output will be a number triangle,

Answer 1

so you need to look at
• basic structure of a Java program with main()
• using an int variable
• for() loop.
// simple output

then
• how to run java on computer, offline
• String variable
• Integer.parseInt()
• import JOptionPane
• JOptionPane as input
• JOptionPane as output

also understand triangle numbers (as a number sequence)

https://docs.oracle.com/en/java/javase/23/docs/api/java.base/java/lang/Integer.html#parseInt(java.lang.String)

https://www.geeksforgeeks.org/java-joptionpane/

https://docs.oracle.com/en/java/javase/23/docs/api/java.desktop/javax/swing/JOptionPane.html