Functions - Fibonacci series upto limit

# Functions - Fibonacci series upto limit

def fn_fib(el):
    n1 = -1
    n2 = 1
    while(True):
        fib = n1 + n2
       
        if(fib > el):
            return
           
        print(fib, end = " ")

        n1, n2 = n2, fib

# Main Program

end_limit = int(input("Enter ending limit :"))
print("Fibonacci series upto", end_limit)
fn_fib(end_limit)