Although it was once the most popular programming language on the Tiobe index, C had been trending sharply downward for some time. Last August it hit an all-time low rating of 6.477 percent. However, that trend has completely reversed itself, and C had a 10.158 rating in the December 2017 update to the Tiobe index of programming language popularity.
That jump puts C in contention for Tiobe’s programming language of the year award, which is given to the language that makes the largest gains in popularity. Other contenders include Kotlin and Matlab.