Question 31 pts To determine the length of a string that’s in a variable named city, you can use this code:   len(city)   city.len()   length(city)   city.length()   Flag this Question Question 41 pts To retrieve the fourth character in a string that’s stored in a variable named city, you can use this code:   city(3)   city[3]   city(4)   city[4]   Flag this Question Question 51 pts Which of the following will display this result? B = 66   print("B = ", char("B"))   print("B = ", ord("B"))   print("B = ", ascii("B"))   print(ord(66))

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Header files

A file with an extension that has some predefined declarations and definitions is called a header file. Every computer program imports a set of header files to perform common tasks such as getting input, displaying output, and so forth. Every language has different header files (such as C, JAVA, Python, and C++). In this article, header files are explained mainly in the context of the C/C++ language.