如何在bash函数中将数字显示到小数点后两位 [英] How to display number to two decimal places in bash function
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问题描述
我应该如何获取以秒为单位的数字,并以秒为单位显示到小数点后两位?伪代码遵循dTime函数,我不确定,但是您会得到我想要的目标.
How should I take a number that is in hundreths of seconds and display it in seconds to two decimal places? Psuedo code to follow the dTime function I am not sure about but you'll get what I'm aiming for I think.
function time {
echo "$(date +%N)/10000000"
}
function dTime {
echo "($1/100).(${$1:${#1}-3:${#1}-1})"
}
T=$time
sleep 2
T=$dTime T
推荐答案
Bash具有内置的printf函数:
Bash has a printf function built in:
printf "%0.2f\n" $T
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