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  1. echo “ enter a number”
  2. read a
  3. square = `expr $a \* $a`
  4. echo $square
Success #stdin #stdout #stderr 0.01s 5408KB
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stdin
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Standard input is empty
stdout
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“ enter a number”
stderr
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./prog.sh: line 3: square: command not found
https://ideone.com/2iI8O2
language:
Bash (bash 5.0.3)
created:
1 year ago
visibility:
public

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