seq 9 | sed 'H;g' | awk -v RS='' '{for(i=1;i<=NF;i++)printf("%dx%d=%d%s", i, NR, i*NR, i==NR?"\n":"\t")}'
awk print multiplication table
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Origin blog.csdn.net/Alen_xiaoxin/article/details/105097214
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