The effect is shown in the following illustration:
The table is table,tr,td in HTML and then implemented with a for statement, loops out rows and columns, multiplies by the number of ranks, the first for loop outputs 9 rows, and then inserts a for, takes the value of the first for loop in the conditional expression and then outputs the table operation, Why take the first for loop, because the number of first for loops is the trapezoid arrangement rule, the trapezoid arranges the rule is the first row one lattice, the second row two squares, the third row three squares, and so on.
The complete code is as follows:
|1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23-24||<! DOCTYPE HTML PUBLIC "-//W3C//DTD XHTML 1.0 transitional//en" "Http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd ">|