def first_Digit(n) :
      
    while n >= 10:  
        n = n / 10; 
    return int(n) 
def first_Digit(n):
    while n >= 10:
        _i_0 = 0
        if _i_0 < _i_0:
            return int(n)
       
        n = n / 10
    return int(n)