A Pseudo Code is an informal way of writing the steps that should be followed for writing a program for human understanding. It should be just written in the English language to make the complex program easy to understand.

For graphical representation, we use the alternative of pseudo-code which is Flow Charts.

An algorithm for the factorial of a given number:

1. Start
2. Initialize fact = 1
3. Input the value of n from the user
4. For i = 0 to i <= n repeat the process
5. fact = fact * i
6. i++ (increment i by one)
7. print the fact value
8. stop

Now its pseudo code will be:

• Start the program
• Declare variables fact and n
• Enter the number for n
• for i=1 to i <=n
• Perform fact = fact * i
• Output fact
• End the program

By using the above pseudo-code, creating a program for the factorial of a given number using for loop:

#include <stdio.h>

void main() {
int n, fact=1,i;
printf("enter value for n");
scanf("%d",&n);
for(i=1; i<=n; i++) {
fact=fact*i;
}
printf("\n factorial of %d is %d", n, fact);
}

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