Re: [Help-bash] something about bc

[lxnf98mm]

On Wed, 28 Dec 2011, lina wrote:

> Hi,
>
> I tried but still don't know how to achieve it with *bc*
>
> some wrong try:
>
> $ a=1.5 ; a+=1 ; echo $a
> 1.51
>
> $ a=1.5 ; a+=1 | bc; echo $a
> 1.5
>
> $ a=1.5 ; let "a+=1" | bc; echo $a
> bash: let: 1.5: syntax error: invalid arithmetic operator (error token is 
> ".5")
> 1.5

echo "a=1.5; a+=1; print a;" | bc