Why do we need format specifier?

The format specifier is used during input and output. It is a way to tell the compiler what type of data is in a variable during taking input using scanf() or printing using printf().

What is the difference between printf and puts?

puts() vs printf() for printing a string 1) puts(str); 2) printf(str); You can try following programs for testing the above discussed differences between puts() and printf().

Are used to format the output of the printf () function?

The function printf() is used for formatted output to standard output based on a format specification. The format specification string, along with the data to be output, are the parameters to the printf() function.

Why do we use \%U in C programming?

\%u is used for unsigned integer. Since the memory address given by the signed integer address operator \%d is -12, to get this value in unsigned integer, Compiler returns the unsigned integer value for this address.

What is the format specifier used to print a string?

The commonly used format specifiers in printf() function are:

Format specifier	Description
\%p	It is used to print the address in a hexadecimal form.
\%c	It is used to print the unsigned character.
\%s	It is used to print the strings.
\%ld	It is used to print the long-signed integer value.

How does the printf () functions vary from the puts () function?

But both are not same, their functionality, syntaxes and usages are different; basically they have two differences: printf can print the value of mixed type of variables but puts can’t print, puts has single parameter that is character array (character pointer).

What is the difference between printf and puts in C++?

printf can print the value of mixed type of variables but puts can’t print, puts has single parameter that is character array (character pointer). printf prints whatever you provide, it may be text, text + values etc without adding new line after the text while puts add one more…

What happens if you use incorrect format specifier in printf()?

Get JetBrains Toolbox with its 15+ code editors for all languages and technologies included in one app. If you use incorrect format specifier in printf (), it is undefined behaviours. It means anything can happens. If a conversion specification is invalid, the behavior is undefined.

What is the meaning of undefined behaviors in printf?

If you use incorrect format specifier in printf (), it is undefined behaviours. It means anything can happens. If a conversion specification is invalid, the behavior is undefined. If any argument is not the correct type for the corresponding conversion specification, the behavior is undefined.