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Created November 17, 2020 11:50
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Shell Expansion Modes
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sh-exp-modes.md

Modes

  • Parameter Expansion: ${}
  • Command Substitution: $()
  • Arithmetic Expansion: $(())

Examples

Parameter Expansion

for file in $(ls); do echo "hello ${file}"; done;

Command Substitution

for file in $(ls); do echo hello $file; done;

Arithmetic Expansion

echo $((1+1))
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