What is the scanf in Java?
What is the scanf in Java?
Java Scanner class allows the user to take input from the console. It belongs to java. util package. It is used to read the input of primitive types like int, double, long, short, float, and byte.
What is printf () and scanf ()?
printf() and scanf() in C The printf() and scanf() functions are used for input and output in C language. Both functions are inbuilt library functions, defined in stdio. h (header file).
What is the difference between printf () and scanf ()?
In the first parameter of printf and scanf, we pass Format string or Format specifier string, we specify, what type of the value that the user is going to enter. Note: The major difference between printf and scanf is, In printf() we pass variable values whereas in scanf() we pass the variable address.
What is the work of printf and scanf?
printf or print function in C takes a formatting string and couple of optional variables as input and outputs strings to console while converting input variables to strings. Printf and scanf takes multiple arguments and these functions are called variable length arguments function or vararg function.
What is Java Util NoSuchElementException?
The NoSuchElementException in Java is thrown when one tries to access an iterable beyond its maximum limit. The exception indicates that there are no more elements remaining to iterate over in an enumeration. The NoSuchElementException is thrown by the following: iterator::next()
What is nextInt () in Java?
The nextInt(radix) method of java. util. Scanner class scans the next token of the input as a Int. If the translation is successful, the scanner advances past the input that matched. If the parameter radix is not passed, then it behaves similarly as nextInt(radix) where the radix is assumed to be the default radix.
What is %d in printf?
%s tells printf that the corresponding argument is to be treated as a string (in C terms, a 0-terminated sequence of char ); the type of the corresponding argument must be char * . %d tells printf that the corresponding argument is to be treated as an integer value; the type of the corresponding argument must be int .
What is the function of printf?
The printf() function sends a formatted string to the standard output (the display). This string can display formatted variables and special control characters, such as new lines (‘\n’), backspaces (‘\b’) and tabspaces (‘\t’); these are listed in Table 2.1.
Why is scanf used in C?
The scanf function allows you to accept input from standard in, which for us is generally the keyboard. scanf(“%d”, &b); The program will read in an integer value that the user enters on the keyboard (%d is for integers, as is printf, so b must be declared as an int) and place that value into b.
What are the basic concepts of how printf () works?
Printf working principle User supply a string and input arguments. Like printf(“Hello, my name is %s having an id %d”, name, id); Printf creates an internal buffer for constructing output string. Now printf iterates through each characters of user string and copies the character to the output string.
How do I avoid Java Util NoSuchElementException?
How to avoid NoSuchElementException?
- public class NoSuchElementException {
- public static void main(String[] args) {
- Set exampleleSet = new HashSet();
- Iterator it = exampleleSet.iterator();
- while(it.hasNext()) {
- System.out.println(it.next());
- }
- }
When to use printf scanf in javatpoint?
The printf () function is used for output. It prints the given statement to the console. The syntax of printf () function is given below: The format string can be %d (integer), %c (character), %s (string), %f (float) etc. The scanf () function is used for input. It reads the input data from the console.
What are the specifiers for printf ( ) in Java?
Format specifiers include flags, width, precision, and conversion characters in this sequence: Specifiers in the brackets are optional. Internally, printf () uses the java.util.Formatter class to parse the format string and generate the output. Additional format string options can be found in the Formatter Javadoc. 2.2. Conversion Characters
How to format a string with printf ( ) in Java?
Syntax 1 2.1. Format Rules. Let’s have a look at format string more closely. 2 2.2. Conversion Characters. The conversion-character is required and determines how the argument is formatted. 3 2.3. Optional Modifiers. The [flags] define standard ways to modify the output and are most common for formatting integers and floating-point numbers.
How is the scanf function used in C?
The scanf () function is used for input. It reads the input data from the console. Let’s see a simple example of c language that gets input from the user and prints the cube of the given number. The scanf (“%d”,&number) statement reads integer number from the console and stores the given value in number variable.
