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Articles on Trending Technologies
Technical articles with clear explanations and examples
Different Methods to find Prime Number in Java
A prime number is a number that is only divisible by one or itself. Some of the prime numbers are 2, 3, 5, 7, 11, 13 etc.Some of the different methods to find a prime number in Java are given as follows −Method 1 - Find if a number is prime without using a functionA program that finds if the given number is prime without using a function is given as follow −Examplepublic class Example { public static void main(String args[]) { int num = 11, flag=0; if(num == 0||num == 1) { System.out.println( num + " is not a prime number"); } else { for(int i = 2; i
Read MoreCreating String Object from Character Array in Java
Here is our character array.char[] ch = { 'T', 'E', 'S', 'T'};To create string object from the above character array is quite easy. Add the array to the string parameter as shown below −String str = new String(ch);Examplepublic class Demo { public static void main(String[] args) { char[] ch = { 'T', 'E', 'S', 'T'}; String str = new String(ch); System.out.println(str); } }OutputTEST
Read Moregetchar_unlocked() in C
The function getchar_unlocked() is deprecated in Windows because it is a thread unsafe version of getchar(). It is suggested not to use getchar_unlocked(). There is no stream lock check that’s why getchar_unlocked is unsafe. The function getchar_unlocked() is faster than getchar().Here is the syntax of getchar_unlocked() in C language,int getchar_unlocked(void);A program of getchar_unlocked() in C is as follows −Example#include int main() { char val; val = getchar_unlocked(); printf("Enter the character : "); printf("Entered character : %c", val); return 0; }OutputHere is the outputEnter the character : a Entered character : a
Read MoreCreating String Object from certain part of a character Array in Java
Here is our character array.char[] ch = { 'T', 'E', 'S', 'T', 'I', 'N', 'G'};Create string object from some part of a string using the following String constructor. Through this we are fetching substring “IN” from the character array.String str = new String(ch, 4, 2);Examplepublic class Demo { public static void main(String[] args) { char[] ch = { 'T', 'E', 'S', 'T', 'I', 'N', 'G'}; String str = new String(ch, 4, 2); System.out.println(str); } }OutputIN
Read MoreConvert day of year to day of month in Java
Firstly, set the day of year using DAY_OF_YEAR constant.Calendar cal = Calendar.getInstance(); cal.set(Calendar.YEAR, 2018); cal.set(Calendar.DAY_OF_YEAR, 320);Now, get the day of month −int res = cal.get(Calendar.DAY_OF_MONTH);The following is an example −Exampleimport java.util.Calendar; public class Demo { public static void main(String[] args) { Calendar cal = Calendar.getInstance(); cal.set(Calendar.YEAR, 2018); cal.set(Calendar.DAY_OF_YEAR, 320); System.out.println("Date = " + cal.getTime()); int res = cal.get(Calendar.DAY_OF_MONTH); System.out.println("Day of month = " + res); } }OutputDate = Fri Nov 16 07:54:55 UTC 2018 Day of month = 16
Read MoreCreating a string from a subset of the array elements in Java
To get a string from a subset of the character array elements, use the copyValueOf() method. This method returns a String that represents the character sequence in the array specified.Here is our character array.char[] ch = { 'T', 'E', 'S', 'T', 'I', 'N', 'G'};Now, let us create a string from the subset of the above array elements.String str = String.copyValueOf(ch, 4, 2);Examplepublic class Demo { public static void main(String[] args) { char[] ch = { 'T', 'E', 'S', 'T', 'I', 'N', 'G'}; String str = String.copyValueOf(ch, 4, 2); System.out.println(str); } }OutputIN
Read Moreisless() in C/C++
The function isless() is used to check that first argument is less than the second one. It is declared in “math.h” header file in C language. It returns true if successful otherwise it returns false.Here is the syntax of isless() in C language, bool isless(value1 , value2);Here, value1 − This is the first argument which will be checked with value2.value2 − This is the second argument which is used to check value1 ans see that it is less or not.Here is an example of isless() in C language, Example#include #include int main() { int val1 = 48; ...
Read MoreWhen should you use a class vs a struct in C++?
Structures and classes are very similar in C++ except for some differences. So details about these differences are given below that help to decide when to use a class or structure in C++.Differences between Class and StructureAll the members of a class are private by default. This is different compared to structures as all the members of a structure are public by default.A program that demonstrates a class in C++ is given as follows −Example#include using namespace std; class Example { int val; }; int main() { Example obj; obj.val = 20; return 0; }This ...
Read MoreGet floor value of a number using Math.floor in Java
To get the floor value of a number, we use the java.lang.Math.floor() method. The Math.floor() method returns the largest (closest to positive infinity) double value which is less than or equal to the parameter and has a value which is equal to a mathematical integer on the number line. If the parameter is NaN or an infinity or positive zero or negative zero, then the result is the same as the argument.Declaration - The java.lang.Math.floor() method is declared as follows −public static double floor(double a)Let us see a program to get the floor value of a number in Java.Exampleimport java.lang.Math; ...
Read MoreEnum for days of week in Java
To set enum for days of the week, set them as constantsenum Days { Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, Sunday }Now create objects and set the above constants −Days today = Days.Wednesday; Days holiday = Days.Sunday;The following is an example −Examplepublic class Demo { enum Days { Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, Sunday } public static void main(String[] args) { Days today = Days.Wednesday; Days holiday = Days.Sunday; System.out.println("Today = " + today); System.out.println(holiday+ " is holiday"); } }OutputToday = Wednesday Sunday is holiday
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