Why this code is not showing proper result

Question

age = int(input())
name = input()

if age>=18:
print("Welcome"+ name)
else:
print('Sorry')

Answer 1

# add a space
print("Welcome "+ name)

Answer 2

print('welcome', name)

Answer 3

Or like this with a formatted string literal:
print(f"Welcome {name}")

Answer 4

print('Welcome %s'%(name))