Bash 把浮点(float)转化成整数(int)

第一种方法, 根据这篇文章所说:

Shell 中的花括号的特殊用法



第二种方法: 使用bc 命令

$ echo "($float+0.5)/1" | bc

第三种方法: 使用 printf

$ myduration=6.5
$ myduration=$( printf "%.0f" $myduration )
$ echo $myduration



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