using assignment 1

[Yarka]

Hi,

When I do:
let "a = $a % 5"
my output is:
let: a = % 5: syntax error: operand expected (error token is "% 5")
Why I obtain this error? How can I correct this?

Thanks.

 

[PHV]

And this ?
let a="$a % 5"

Hope This Helps, PH.
Want to get great answers to your Tek-Tips questions? Have a look at FAQ219-2884 or FAQ181-2886

 

[p5wizard]

bash should also know (( )) arythmetic as an equivalent for the let command:

(( a=a%5 ))
(( a=a % 5 ))

And there's really no need for the $s, "let" knows about the value of variables or tokens without the need for variable substitution by the shell...

let a=a%5
let a=$a%5
let a=${a}%5
let a='a % 5'
let a="a % 5"
let a="$a % 5"
let a="${a} % 5"

If you do want to use "let" and $s and spaces for clarity, you also have to use double quotes or the shell won't substitute the variable values. (Variable substitution doesn't occur inside single quotes)


HTH,

p5wizard