You would like to buy 2 fruits. If there are 4 types of fruit to choose from, how many ways are there for you to buy?

4 2 [OP_COMB]
var_a = 4
var_b = 2
var_c = 1
var_a = int(var_a)
var_b = int(var_b)
for i, elem in enumerate(range(var_b)):
    var_c = var_c * (var_a-i)
for i, elem in enumerate(range(var_b)):
    var_c = var_c / (i+1)
print(int(var_c))