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Program to verify if a given number belongs to Fibonacci sequence or not:

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# Program to verify if a given number belongs to Fibonacci sequence or not:
n=input("Enter a number to check if it belongs to Fibonacci series or not:")
a=1
b=1
c=0
c=a+b
n=int(n)
while c<=n:
 a=b
 b=c
 c=a+b
if b==n:
 print("Entered number belongs to Fibonacci series.")
else:
 print("Entered number does not belong to Fibonacci series.")
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