start = 1;
end = 20;
print("Prime numbers between 1 and 20:")
for start in range(start, end+1):
count = 0;
for i in range(1, start+1):
if(start % i == 0):
count += 1
if(count == 2):
print(start, end=" ")
OUTPUT
Prime numbers between 1 and 20:
2 3 5 7 11 13 17 19