学了点js

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const character = "!";
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const count = 10;
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const rows = [];
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let inverted = false;
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function padRow(rowNumber, rowCount) {
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    return (
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        " ".repeat(rowCount - rowNumber) +
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        character.repeat(2 * rowNumber - 1) +
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        " ".repeat(rowCount - rowNumber)
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    );
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}
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for (let i = 1; i <= count; i++) {
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    if (inverted) {
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        rows.unshift(padRow(i, count));
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    } else {
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        rows.push(padRow(i, count));
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    }
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}
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let result = "";
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for (const row of rows) {
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    result = result + "\n" + row;
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}
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console.log(result);

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// running tests
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// tests completed
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// console output
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         !
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        !!!
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       !!!!!
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      !!!!!!!
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     !!!!!!!!!
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    !!!!!!!!!!!
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   !!!!!!!!!!!!!
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  !!!!!!!!!!!!!!!
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 !!!!!!!!!!!!!!!!!
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!!!!!!!!!!!!!!!!!!!