How do you find the factorial of a number in Prolog?

Table of Contents

predicates factorial(integer, real) go clauses go if write(“Enter a positive integer number:”), readint(N), factorial(N,Result), write(“Factorial of”, N, “is=”, Result). factorial(0, 1) factorial(N, Result) if N>0, N1=N-1, factorial(N1, Res), Result=N*Res.

What is factorial Prolog?

Prolog factorial consists of two clauses. First is a unit clause with nobody and the second is a rule, which is with the body. Prolog programming is a logical and declarative programming language.

What is a Prolog program?

Prolog is a logical and a declarative programming language. The name itself, Prolog, is short for PROgramming in LOGic. Prolog’s heritage includes the research on theorem provers and other automated deduction systems developed in the 1960s and 1970s.

How do you write a command in Prolog?

To write the output we can use the write() predicate. This predicate takes the parameter as input, and writes the content into the console by default. write() can also write in files. Let us see some examples of write() function.

What is factorial in AI?

The factorial, symbolized by an exclamation mark (!), is a quantity defined for all integer s greater than or equal to 0.

How do you write a program in Prolog?

To create a program in Prolog, the simple way is to type it into the text editor and then save it as a text file like prolog1.pl. The following example shows a simple program of Prolog. The program contains three components, which are known as clauses. Each clause is terminated using a full stop.

What is the factorial Program?

This program takes a positive integer from the user and computes the factorial using for loop. Since the factorial of a number may be very large, the type of factorial variable is declared as unsigned long long . If the user enters a negative number, the program displays a custom error message.

What is algorithm write for factorial Program?

Algorithm of C Program for Factorial Ask the user to enter an integer to find the factorial. Read the integer and assign it to a variable. From the value of the integer up to 1, multiply each digit and update the final value. The final value at the end of all the multiplication till 1 is the factorial.

How do you write a run and program in Prolog?

Write a prolog program as a text file with a . For example, program.pl . Open a terminal (Ctrl+Alt+T) and navigate to the directory where you stored your program. Open SWI-Prolog by invoking swipl . In SWI-Prolog, type [program] to load the program, i.e. the file name in brackets, but without the ending.

How do I create a Prolog program?

Here is how you create a Prolog program.

Double-click the Prolog program icon.
Use the File menu of the resulting window to create a new file and give it a name, with the extension .
Enter the text of your file in the file window.

How do you find the factorial of a number pseudocode?

Step-by-step explanation:

Pseudocode for Factorial of a number :
Step 1: Declare N and F as integer variable.
Step 2: Initialize F=1.
Step 2: Enter the value of N.
Step 3: Check whether N>0, if not then F=1.
Step 4: If yes then, F=F*N.
Step 5: Decrease the value of N by 1 .
Step 6: Repeat step 4 and 5 until N=0.