Use Formula to sort two strings

[Ray Ray]

Dear experts

I design the following spreadsheet. Please advise how I can achieve the
result on column C (i.e. it sorts column A and B in ascending order, and puts
the smaller string in the front and the bigger one at the back)?

A B C
1 Atlanta Los Angeles Atlanta-Los Angeles
2 Orlando Chicago Chicago-Orlando
3 Mexico City Miami Mexico City-Miami

 

[Mike H]

Put this in C1 and drag down.

=IF(LEN(A1)<LEN(B1),A1&" "&B1,B1&" "&A1)

Mike

 

[David Biddulph]

From the look of the OP's example, perhaps he wants:
=IF(A1<B1,A1&"-"&B1,B1&"-"&A1)