Notice, that we have used &testInteger inside scanf(). When the user enters an integer, it is stored in the testInteger variable. Here, we have used %d format specifier inside the scanf() function to take int input from the user. The scanf() function reads formatted input from the standard input such as keyboards.Įxample 5: Integer Input/Output #include In C programming, scanf() is one of the commonly used function to take input from the user. To print char, we use %c format specifier. Similarly, we use %lf to print double values. To print float, we use %f format specifier. Here, the %d inside the quotations will be replaced by the value of testInteger.Įxample 3: float and double Output #include We use %d format specifier to print int types. The return 0 statement inside the main() function is the "Exit status" of the program.To use printf() in our program, we need to include stdio.h header file using the #include statement.The function prints the string inside quotations. The printf() is a library function to send formatted output to the screen.The code execution begins from the start of the main() function. All valid C programs must contain the main() function.The function sends formatted output to the screen. In C programming, printf() is one of the main output function.
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