# Give an explanation for predecessor and successor?

Successor and predecessor are also known as after number and before number respectively.

## Answer: The number that is written immediately before a number is called its predecessor. The number that is written immediately after a number is called its successor.

For a given number 'n', the predecessor is always 1 lesser than the number that is n - 1 and the successor is always 1 more than the given number that is n + 1.

**Explanation:**

Let's take an example to understand this.

Let's consider a number 5.

The number just before 5 is 5 - 1 = 4, therefore the predecessor of the number 5 is 4.

The number just after 5 is 5 + 1 = 6, therefore the successor of the number 5 is 6.

### Therefore, the predecessor of the number 5 is 4, and the successor of the number 5 is 6.

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