Where is printf

The format string indicates how many arguments follow and what their types are. The arguments var1, var2, …, varN are the variables whose values are formatted and printed according to format specifications of the format string. The arguments must match in n umber, order and type with the format specifications. When we want to display some text or string to standard output unit then we can use printf as printf "Welcome to the world of C programming" ;.

This statement simply prints Welcome to the world of C programming to the standard output unit. Here, header file stdio. By default all characters are printed until the ending null character is encountered. When no precision is specified, the default is 1.

If the period is specified without an explicit value for precision, 0 is assumed. The precision is not specified in the format string, but as an additional integer value argument preceding the argument that has to be formatted. The argument is interpreted as a short int or unsigned short int only applies to integer specifiers: i, d, o, u, x and X.

The argument is interpreted as a long int or unsigned long int for integer specifiers i, d, o, u, x and X , and as a wide character or wide character string for specifiers c and s. The argument is interpreted as a long double only applies to floating point specifiers: e, E, f, g and G. If successful, the total number of characters written is returned.

On failure, a negative number is returned. C library function - printf Advertisements. Show 5 more comments. Active Oldest Votes. Improve this answer. Add a comment. After some digging, the following explanation makes the most sense to me: short version a header file contains declarations that the compiler needs, but not implementations.

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