What is the output of this code? def func ( (x) ) : [ ext { res }=0 ] for ( mathrm{i} ) in range ( (mathrm{x}) ) : [ ext { res }+=mathbf{i} ] return res print(func(4)) 6 5 10 4

What is the output of this code? def func( x ): res=0 for i in range (x) : res+=i return res print(func(4)) 6 5 10