The solution to the shell's simple calculator and possible "too many argument" problem
tags: linux
Today I made a simple calculator using shell as follows:
After use, the calculator is used normally when performing the "+" and "-" operation, and when starting the "\*" operation, the following error will appear: "too many argument"-
I tinkered for a long time and finally found a solution online (changing the [ ] after the judgment statement into a double [ [ ]], the details are as follows——
Then the calculator runs normally—
The self-taught shell doesn’t understand the solution to this problem very well. If anyone knows it, you can comment and give me some advice.
Hope this post will be helpful to you.
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