js write Yang Hui triangle (two-dimensional array)

<!DOCTYPE html>
<html leng = 'en'>
 	<head>
  		<meta charset = 'UTF-8'/>
	 </head>
	 <body>
	  	<script>
			var arr = [[],[],[],[],[],[],[],[],[],[]]
			for(var i = 0; i < 10; i++){
    
    
				for(var j = 0; j < i + 1; j++){
    
    
					if(j === 0 || j === i){
    
    
						arr[i][j] = 1;
					}else{
    
    
						arr[i][j] = arr[i - 1][j - 1] + arr[i - 1][j];
					}
				}
			}
			console.log(arr);
		</script>
 	</body>
</html>

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Origin blog.csdn.net/weixin_48727085/article/details/107727449