Find the number of even numbers from 1 to 10.
1 10 [OP_LIST_EVEN] [OP_LIST_LEN]
var_a = 1
var_b = 10
list_a = []
if var_a%2!=0:
    for i in range(var_a+1, var_b+1, 2):
        list_a.append(i)
else:
    for i in range(var_a, var_b+1, 2):
        list_a.append(i)
var_c = len(list_a)
print(int(var_c))