Given a list, print all the sublists of a list.**Examples: **

Input : list = [1, 2, 3] Output : [[], [1], [1, 2], [1, 2, 3], [2], [2, 3], [3]] Input : [1, 2, 3, 4] Output : [[], [1], [1, 2], [1, 2, 3], [1, 2, 3, 4], [2], [2, 3], [2, 3, 4], [3], [3, 4], [4]]

**Approach: **

The approach will be run two nested loop till the length of the given list. The outer loop i traverse from 0 to length of the list and inner loop goes from 0 to i. Need to add 1 to length because range only goes from 0 to i-1. To get the subarray we can use slicing to get the subarray.

Step 1: Run a loop till length+1 of the given list.

Step 2: Run another loop from 0 to i.

Step 3: Slice the subarray from j to i.

Step 4: Append it to a another list to store it

Step 5: Print it at the end

Below is the Python implementation of the above approach:

## Python

`# Python program to print all` `# sublist from a given list` `# function to generate all the sub lists` `def` `sub_lists (l):` ` ` `lists ` `=` `[[]]` ` ` `for` `i ` `in` `range` `(` `len` `(l) ` `+` `1` `):` ` ` `for` `j ` `in` `range` `(i):` ` ` `lists.append(l[j: i])` ` ` `return` `lists` `# driver code` `l1 ` `=` `[` `1` `, ` `2` `, ` `3` `]` `print` `(sub_lists(l1))` |

**Output:**

[[], [1], [2], [1, 2], [3], [1, 3], [2, 3], [1, 2, 3]]

Attention geek! Strengthen your foundations with the **Python Programming Foundation** Course and learn the basics.

To begin with, your interview preparations Enhance your Data Structures concepts with the **Python DS** Course. And to begin with your Machine Learning Journey, join the **Machine Learning – Basic Level Course**