Finish putting the + in the line and print it out again:

name = 'World'
line = '+'
for _ in name:
    line += '-'
line += '+'
print(line)
print('|' + name + '|')
print(line)

Strings also can be repeated with a * operator:

name = 'World'
line = '+' + '-'*len(name) + '+'
print(line)
print('|' + name + '|')
print(line)