四舍五入如何实现

四舍五入怎么实现？
我想把计算完的数值按四舍五入后显示

------解决方案--------------------
用round()


This expression returns 9.62:

Round(9.624, 2)

This expression returns 9.63:

Round(9.625, 2)

This expression returns 9.600:

Round(9.6, 3)

This expression returns -9.63:

Round(-9.625, 2)

This expression returns -10:

Round(-9.625, -1)
------解决方案--------------------
dec ls_sswr
ls_sswr=9.278
gwgz=round(ls_sswr,2)

结果:
gwgz=9.28