Dateien des bash Tutorioals auf raspithek.de
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# calc.sh
a=5
b=10
# Summenbildung falsch
summe=a+b
echo "Summe falsch: ${summe}"
# Summenbildung korrekt
let c=a+b
echo "Summe: ${c}"
let d=b-a
echo "Differenz: ${d}"
e=$(expr ${a} \* ${b})
echo "Multiplikation: ${e}"
let f=b/a
echo "Division: ${f}"