2025年JavaScript基础：循环结构之图形打印练习

科技前沿 • 2025-01-06 18:38 • 阅读 76

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<script> /* 行i 列k k=i+1 u 0 1 uu 1 2 uuu 2 3 uuuu 3 4 uuuuu 4 5 uuuuuu 5 6 uuuuuuu 6 7 */ for(var i=0; i<7; i++){ for(var k=0; k<i+1; k++){ document.write("U"); } document.write("<br>"); } /* 行i 空格k 字母U j u 0 6 1 uu 1 5 2 uuu 2 4 3 uuuu 3 3 4 uuuuu 4 2 5 uuuuuu 5 1 6 uuuuuuu 6 0 7 k=6-i j=i+1 */ for(var i=0; i<7; i++){ for(var k=0; k<6-i; k++){ document.write("&nbsp;&nbsp;"); } for(var j=0; j<i+1; j++){ document.write("u"); } document.write("<br>"); } /* 行i 空格k 字母 j u 0 6 1 uuu 1 5 3 uuuuu 2 4 5 uuuuuuu 3 3 7 uuuuuuuuu 4 2 9 uuuuuuuuuuu 5 1 11 uuuuuuuuuuuuu 6 0 13 k=6-i j=2*i+1 */ for(var i=0; i<7; i++){ for(var k=0; k<6-i; k++){ document.write("&nbsp;&nbsp;"); } for(var j=0; j<2*i+1; j++){ document.write("u"); } document.write("<br>"); } /* 行i 空格k 字母 j uuuuuuuuuuuuuu 0 0 14 uuuuuuuuuuuu 1 1 12 uuuuuuuuuu 2 2 10 uuuuuuuu 3 3 8 k = i j = 14-2*i */ for(var i=0; i<4; i++){ for(var k=0; k<i; k++){ document.write("&nbsp;&nbsp;"); } for(var j=0; j<14-2*i; j++){ document.write("u"); } document.write("<br>"); } /* u u u u u u u u u u u u u u u u */ for(var i=0; i<5; i++){ for(var k=0; k<4-i; k++){ document.write("&nbsp;&nbsp;"); } for(var j=0; j<2*i+1; j++){ if(j==0 || j==2*i){ document.write("u"); } else { document.write("&nbsp;&nbsp;"); } } document.write("<br>"); } for(var i=0; i<4; i++){ for(var k=0; k<i+1; k++){ document.write("&nbsp;&nbsp;"); } for(var j=0; j<7-2*i; j++){ if(j==0 || j==6-2*i){ document.write("u"); } else { document.write("&nbsp;&nbsp;"); } } document.write("<br>"); } </script>

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2025年JavaScript基础：循环结构之图形打印练习

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