This book constitutes the refereed proceedings of the 12th International Symposium on Functional and Logic Programming, FLOPS 2014, held in Kanazawa, Japan, in June 2014. The 21 full papers and 3 invited talks presented in this volume were carefully reviewed and selected from 41 submissions. They deal with declarative programming, including functional programming and logic programming.

This book constitutes the refereed proceedings of the 12th International Symposium on Functional and Logic Programming, FLOPS 2014, held in Kanazawa, Japan, in June 2014. The 21 full papers and 3 invited talks presented in this volume were carefully reviewed and selected from 41 submissions. They deal with declarative programming, including functional programming and logic programming.