Basic Input/Output C Program Example 1. #include < stdio.h > // header file for standard input & output functions // main function of the program which execute first in every program - starting point int main () { printf ( " Hello World \n " ); // an integer variable declaration int x ; // Read a value from standard input scanf ( " %d " , & x ); // Write value to the standard output printf ( " %d \n " , x ); // return 0 tells that program executed successfully return 0 ; } Example 2. #include < stdio.h > int main () { int x = 5 ; printf ( " X data is= %d \n " , x ); int y = 7 ; printf ( " Y data is= %d \n " , y ); y = 50 ; printf ( " Y data is= %d \n " , y ); printf ( " Address of X is= %u \n " , & x ); return 0 ; } Note :- A variable with '&' in prefix represents the address of that variable. e...
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