> You could do:
>
> while True:
> x = raw_input("Enter x=>")
> if x != "" : break # if you just press enter, raw_input returns an
> empty string
>
> Note that this still leaves out the case when you type something which
> is not a number.
> To cover this case, supposing that you need a float, you could do like
> this (NOT TESTED):
>
> while True:
> x_str = raw_input("Enter x=>")
> if x_str != "" : # to prevent having the error message on empty
> imput
> try:
> x = float(x_str)
> break # if it gets here the conversion in float was succesful
> except ValueError :
> print "The input '%s' cannot be converted in float" % x_str
>
> This code exits from the loop only when you supply a string that
> represents a floating number
>
I modified my code to
#Euler Totient Function
import sys
from math import sqrt
def etf(n):
i,res =2,n
while(i*i<=n):
if(n%i==0):
res-=res/i
while(n%i==0):
n/=i
i+=1
if(n>1):
res-=res/n
return res
def main():
while True:
t=raw_input()
if t!="":break
t=int(t)
while(t):
while True:
x=raw_input()
if x!="":break
x=int(x)
print str(etf(x))
t-=1
if __name__ == "__main__":
main()
Now it is working fine ....thanks!!!
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