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| 1 | - | // In Firefox, press Ctrl+Shift+K then copy and paste. |
| 1 | + | // In Firefox, press Ctrl+Shift+K then copy, paste and run. |
| 2 | ||
| 3 | function printStar(n) | |
| 4 | {
| |
| 5 | var output = ""; | |
| 6 | var level = n*2+1; | |
| 7 | ||
| 8 | for(var i = 1; i <= level; i++) | |
| 9 | {
| |
| 10 | var isOddRow = i%2 == 1; | |
| 11 | var row = Math.floor((i+1)/2); | |
| 12 | var star = i < level ? row*2+1 : (row-1)*2+1; | |
| 13 | for(var j = 1; j <= star; j++) | |
| 14 | {
| |
| 15 | var isOddCol = j%2 == 1; | |
| 16 | output += isOddRow || (!isOddRow && isOddCol) ? "*" : "-"; | |
| 17 | } | |
| 18 | output += "\r\n"; | |
| 19 | } | |
| 20 | return output; | |
| 21 | } | |
| 22 | ||
| 23 | print(printStar(3)); |
