def suma(a=4,b=3):
	return a + b

def resta(a=100,b=90):
	return a - b

def multiplicacion(a,b):
	return a*b

def division(a,b):
	return a/b
	
def isNumber(a):
	if isinstance(a,int) or isinstance(a,float):
		return True
	return False

if __name__ == '__main__':
	print(suma(5,6))
	print(isNumber(10))