A function can take a number of parameters, do required processing and then return a value. There may be a function which does not return any value. You already have seen couple of built-in functions like printf(); Similar way you can define your own functions in C language. Consider the following chunk of code.
Sheila in the sense âa woman, a girlâ became established in Australian English towards the end of the nineteenth century. By the end of the twentieth century it had become a fairly problematic term, mainly as a result of being burdened with many negative and derogatory male attitudes towards women.
Some original source books have her birth name as Sylvia Kirby Allen; however, Allen was her first husband's last name. She consequently used only her first name. There was also a point in time that she used Sylvia Rutledge. She is currently using her married name and is promoted as Sylvia Hutton. She enjoyed crossover music success with the song  Nobody  in 1982. It reached No. 15 Pop and No. 1 Country.