Anil Kumar Mula

#passing function to a function

def do(x,y):
    # this function is to check if first argument is greater than second
 
    if x > y:
     
        return [True,x,y]
    else:
        return [False]

def sub(func):
    lis = func
    #lis = [False]
    #lis = [True,3,2]
    if lis[0] == True:
        return lis[1] - lis[2]
    else:
        return "sub not possible"



print((sub(do(2,3))))  # none
print((sub(do(3,2))))  # 1