4th_to_print_prime_no

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 n1=int(input("Enter lowest interval: "))

n2=int(input("Enter highest interval: "))
for num in range(n1,n2+1):
    if num > 1:#all prime numbers are greater than 1
        for i in range(2,num):
            if num%i==0:
                break
        else:
            print(num)

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