Dealing with digits:

- %10

• gives remainder
• 7463 % 10 = 3

- /10

• gives quotient
• 7463 / 10 = 746

Calculating the number of digits:

Keep taking out quotient till it becomes 0

Creating a number with digits and use it to check palindrome number

sum=sum+digit*10

The above approach mentioned in 2 helps in finding the reverse of a number (like 123→ 321)

We use it to find whether a number is palindrome or not (palindrome means the reverse of a number is same as the number itself). Like 232 is a palindrome number but 123 is not.

Factorial of a number

Factorial of a number n = 123*4…….*n

Intialise a variable fact =1;

Iterate the loop n times and mutiply fact with the iteration variable

Find number of trailing zeros in a number