lhunath 1209547268 learn '$var' is NOT a variable. 'var' is a variable and '$var' is the EXPANSION of that variable. bash replaces it by the contents of the variable 'var'.
lhunath 1209547365 forget
lhunath 1209547390 learn $var is NOT a variable. var is a variable and $var is the EXPANSION of that variable. bash replaces it by the contents of the variable var.