Rosalind #3

[helloworld]


sense = input("DNA sequence: ")

def revcomplement(dna):
rantisense = ""
for i in range(0, len(sense)):
if sense[i] == "A":
rantisense = "T" + rantisense
if sense[i] == "T":
rantisense = "A" + rantisense
if sense[i] == "C":
rantisense = "G" + rantisense
if sense[i] == "G":
rantisense = "C" + rantisense
print(rantisense)

revcomplement(sense)