java

Selection Sort

Selection Sort in Java Selection Sort is a comparison-based sorting algorithm that sorts an array by repeatedly finding the minimum element (considering ascending order) from the unsorted part and putting it at the beginning. The process is continued until the entire array is sorted. Algorithm for Selection Sort Step 1 : Set the first element as …

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Bubble Sort

Bubble Sort in Java Bubble sort is a sorting algorithm that compares two adjacent elements and swaps them if they are in the wrong order that’s expected. Bubble sort algorithm is not suitable for large data sets as its average and worst-case time complexity are quite high. Algorithm for Bubble Sort in Java 1) Start …

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Java instanceof

Java instanceof In Java, instanceof is a keyword used for checking if a reference variable contains a given type of object reference or not(class or subclass or interface).It is known as a comparison operator where the instance is getting compared to type returning boolean true or false as in Java we do not have 0 and 1 …

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Factorial

There are different ways to calculate factorial of number in Java. Following four programs illustrate Java program to calculate factorial of number using loop, iteration, recursion & ternary operator. 1) Simple Java program to calculate Factorial of a number using loop : 2) Java program to calculate Factorial of a number using Iteration : 3) …

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Armstrong Number

Armstrong Number is a number that equals to the sum of its digits, each raised to a power. Armstrong number was discovered by mathematician Michael Frederick Armstrong (1941-2020) and is also known as narcissistic or Plus Perfect or pluperfect number. Armstrong numbers form the OEIS sequence A005188. Example : For one-digit : 1: 1^1 = 12: 2^1 = 23: 3^1 = 3 So,1,2 & 3 are one-digit Armstrong …

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