Finding factorial of a Number in Java - Java Programs. The factorial of a number is defined is the product of natural numbers from one to that particular number. A new variable 'result' of type int is declared and initialised with the integer 1. For this purpose, we use a for loop with a counter i that ranges from 1 to n. Within the loop, the existing value of result will be multiplied with the loop counter. Before entering the loop, result would be initialised to one. The loop will execute thrice with the value of i = 1, 2 and 3. When the value of i becomes 4, the loop condition fails. When the value of i is 1, the existing result would be multiplied with 1 which again gives one. In the second iteration, result will be multiplied with 2 and in the third iteration with 3. These calculations are shown below. When the loop exists, the value result which was initially one would be already multiplied by all natural numbers from 1 to n. Thus, result holds the factorial of the number. The modified loop can be written as. In that case, the loop would look like. The base case can be taken as the factorial of the number 0 or 1, both of which are 1. The factorial of some number n is that number multiplied by the factorial of (n- 1). Mathematically. factorial ( 0 ) = 1factorial ( n ) = n * factorial ( n - 1 ). Given below is a program which calculates the factorial of 7 using recursion. We can use the long data type but still it wouldn't be large enough to hold the factorial of even higher numbers. The solution is to use the Big. Integer class which can handle arbitrarily large numbers which is discussed here.
![]() ![]() ![]() F = factorial(n) returns the product of all positive integers less than or equal to n, where n is a nonnegative integer value. If n is an array, then f contains the. Factorial Program in php. Enter the number whose factorial requires to be found<Br />. ![]()
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