[Tutor] infinite loop

[ADRIAN KELLY]

#i am nearly there guys..........please loop at the infinite loop i am getting here..................PLEASE!!#ADRIAN

def exchange(cash_in):    euro=1    dollar=float(1.35)    base=50    if cash_in>base:        totalreturn=cash_in*dollar    else:        totalreturn=0    return totalreturn
amount=float()def main():    amount = float(raw_input('how much do you want to change:'))    while amount<50:        print 'Sorry, cannot convert an amount under €50 '    else:        total=exchange(amount)        print 'Your exchange comes to: ',total main()
 

 		 	   		  
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