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$var vrijednost varijable var

${var} isto kao $var služi za

pero=1

echo $pero -> 1

echo ${pero}s -> 1s

echo $peros -> ““

Operation if str is unset or null else

var=${str:-expr} var=expr var=${string}

var=${str:=expr} str=expr; var=expr var=${string}

var=${str:+expr} var becomes null var=expr

var=${str:?expr} expr u stderr var=${string}

Evaluacija kornshell varijable

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