Find how many single digits are in all from 2 to 100.
2 100 1 [OP_LIST_ARANGE] 9 [OP_LIST_LESS_EQUAL] [OP_LIST_LEN]
var_a = 2
var_b = 100
var_c = 1
list_a = [i for i in range(var_a, var_b + 1, var_c)]
var_d = 9
list_b = []
for i in list_a:
    if i <= var_d:
        list_b.append(i)
var_e = len(list_b)
print(int(var_e))