Hello Im currently writing a program for the Khan Academy project called bookshelves. I've completed most of the code but I'm having alot of trouble implementing a global variable. Im supposed to have the number of apps per shelf be a global variable at the top of the program. That is, all shelves, except possibly the last shelf, will have the number of apps that you set in the global variable, but the last shelf may have less if the number of apps you have is not divisible by the number. For instance, if there are 7 apps and the global variable is set to 3, the your program should print two shelves of 3 apps and one shelf of 1 app. Then if you change the global variable to 4, then your program would print one shelf of 4 apps and one shelf of 3 apps.

I will paste my code here.

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var book = { title: ["My initial", "Funny Face", "My House", "My Animal", "Dancing Animals", "Racing Animals","Dancing Animals Fun", "Racing Animal Fun","Resize Animal", "Music Quiz","Zoo","Dry Animal", "Ball Follow"], author: ["Camren Woodstock","Camren Woodstock","Camren Woodstock","Camren Woodstock","Camren Woodstock","Camren Woodstock","Camren Woodstock","Camren Woodstock","Camren Woodstock","Camren Woodstock","Camren Woodstock","Camren Woodstock"], stars: [5, 4, 3, 2, 1] }; var a = 1; var b = 20; var c = 0; var d = 0; while (120 * a < 400) { // draw shelf fill(173, 117, 33); rect(0, 120 * a, width, 10); a++; } // draw one book for (var j = 0; j < book.title.length; j++) { if ((10 + 100 * c) + 80 > 400) { b += 120; c = 0; d++; } fill(random(80,200), random(50,240), random(40,200)); rect(6 + 100 * c, b, 90, 100); fill(0, 0, 0); textSize(13); text(book.title[j], 10 + 100 * c, 5 + b, 70, 100); textSize(10); text("By " + book.author[j], 10 + 100 * c, 51 + b, 70, 100); for (var i = 0; i < book.stars[d]; i++) { image(getImage("cute/Star"), (12 + i * 16) + 100 * c, 70 + b, 20, 30); } c ++; }

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The global variable is booksPerShelf and when I change it to 3 it should be 3 books per shelf and when I change the number to 4 it will be 4 books per shelf.