#i = 0
#while i<45 :
#    print(i)
#    i = i + 1 # this is condition

#num = 46
#while num >=46 and num<101 :
#    print(num)
#    num = num + 1

#list = ["Akash","Piush","Vikas","Naman","Diksha" , 67 , 56 , 344 , 87 , 24 , 87 , 45 , 69]
#while list ==list  :
#    print (list)
#    list = list + 1

# Que:- Print first 20 even natural no.
i =2
while i<=40 :
    print(i , end=" ") # end=" " use for printing in same line
    i = i+2