# How can I get the first two digits of a number?

Hello Guys, How are you all? Hope You all Are Fine. Today We Are Going To learn about How can I get the first two digits of a number in Python. So Here I am Explain to you all the possible Methods here.

## How can I get the first two digits of a number?

1. How can I get the first two digits of a number?

previous 2 answers have at least O(n) time complexity and the string conversion has O(n) space complexity too.

2. get the first two digits of a number

previous 2 answers have at least O(n) time complexity and the string conversion has O(n) space complexity too.

## Method 1

You can convert your number to string and use list slicing like this:

```int(str(number)[:2])
```

Output:

```>>> number = 1520
>>> int(str(number)[:2])
15```

## Method 2

Both of the previous 2 answers have at least O(n) time complexity and the string conversion has O(n) space complexity too. Here’s a solution for constant time and space:

```num // 10 ** (int(math.log(num, 10)) - 1)
```

### Function:

```import math

def first_n_digits(num, n):
return num // 10 ** (int(math.log(num, 10)) - n + 1)
```

### Output:

```>>> first_n_digits(123456, 1)
1
>>> first_n_digits(123456, 2)
12
>>> first_n_digits(123456, 3)
123
>>> first_n_digits(123456, 4)
1234
>>> first_n_digits(123456, 5)
12345
>>> first_n_digits(123456, 6)
123456
```

You will need to add some checks if it’s possible that your input number has less digits than you want.

## Summery

It’s all About this issue. Hope all Methods helped you a lot. Comment below Your thoughts and your queries. Also, Comment below which Method worked for you? Thank You.