progs/a410.py


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def compute_Last_Digit(A,B): 
    variable = 1
    if (A == B): 
        return 1
    elif ((B - A) >= 5):  
        return 0
    else:   
        for i in range(A + 1,B + 1): 
            variable = (variable * (i % 10)) % 10
        return variable % 10