# Octave 常用函数

```m
A=bitshift(A，k)      % 返回移位了 k 位的 A 的值。当 K>0 时左移，当 k<0 时右移。
seconds=time()      % Return the current time as the number of seconds since the epoch.
t=now()             % Return the current local date/time as a serial day number (see datenum). 
```