- What is a B in Java?
- What is %d in printf?
- What is %s in regex?
- What does a zA Z0 9 mean?
- What is ++ i and i ++ in Java?
- What is 3f in Java?
- What are specifiers in Java?
- What is D in regular expression?
- What does %s means in Java?
- What does %d do in Java?
- What is printf () in Java?
- What does i ++ mean?
- What does * mean in regular expression?
- What is the use of S in regular expression?
- What does N ++ mean in Java?
- What does \b mean in regex?
- What is * in regular expression?
What is a B in Java?
The Arithmetic Operators Adds values on either side of the operator.
A + B will give 30.
– (Subtraction) Subtracts right-hand operand from left-hand operand.
A – B will give -10..
What is %d in printf?
We use printf() function with %d format specifier to display the value of an integer variable. Similarly %c is used to display character, %f for float variable, %s for string variable, %lf for double and %x for hexadecimal variable.
What is %s in regex?
What does a zA Z0 9 mean?
The bracketed characters [a-zA-Z0-9] mean that any letter (regardless of case) or digit will match. … The _ (underscore) character in the regular expression means that the zone name must have an underscore immediately following the alphanumeric string matched by the preceding brackets.
What is ++ i and i ++ in Java?
++i and i++ both increment the value of i by 1 but in a different way. … Increment in java is performed in two ways, 1) Post-Increment (i++): we use i++ in our statement if we want to use the current value, and then we want to increment the value of i by 1.
What is 3f in Java?
Up vote 1. %. 3f means the same thing in Java as in C/C++. It means a floating point number with three digits after the decimal point.
What are specifiers in Java?
Definition : – Java Access Specifiers (also known as Visibility Specifiers ) regulate access to classes, fields and methods in Java. These Specifiers determine whether a field or method in a class, can be used or invoked by another method in another class or sub-class.
What is D in regular expression?
\d (digit) matches any single digit (same as [0-9] ). The uppercase counterpart \D (non-digit) matches any single character that is not a digit (same as [^0-9] ). \s (space) matches any single whitespace (same as [ \t\n\r\f] , blank, tab, newline, carriage-return and form-feed).
What does %s means in Java?
format characterthe %s is a ‘format character’, indicating “insert a string here”. The extra parameters after the string in your two function calls are the values to fill into the format character placeholders: In the first example, %s will be replaced with the contents of the command variable.
What does %d do in Java?
%d: Specifies Decimal integer. %c: Specifies character. %T or %t: Specifies Time and date. %n: Inserts newline character.
What is printf () in Java?
The printf() method of Java PrintStream class is a convenience method which is used to write a String which is formatted to this output Stream. It uses the specified format string and arguments to write the string.
What does i ++ mean?
unary operatori++ is a unary operator in C++ which increments the value of variable ‘i’ by one. It is used instead of the operation i = i+1 .
What does * mean in regular expression?
A regular expression followed by an asterisk ( * ) matches zero or more occurrences of the regular expression. If there is any choice, the first matching string in a line is used. A regular expression followed by a plus sign ( + ) matches one or more occurrences of the one-character regular expression.
What is the use of S in regular expression?
\s stands for “whitespace character”. Again, which characters this actually includes, depends on the regex flavor. In all flavors discussed in this tutorial, it includes [ \t\r\n\f]. That is: \s matches a space, a tab, a carriage return, a line feed, or a form feed.
What does N ++ mean in Java?
increment nIn expressions, n++ means increment n after you have observed its value; ++n means increment n before you observe its value. … In this case, first the value of variable is incremented by 1 and then the value of variable is used in the operation (such as in an expression).
What does \b mean in regex?
What is * in regular expression?
* means “any number of this”. . * therefore means an arbitrary string of arbitrary length. ^ indicates the beginning of the string.