Nested loops in python are easy

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certainly! nested loops in python are loops that are placed inside another loop. they are useful for iterating over multi-dimensional data structures like lists of lists, matrices, or for generating combinations and permutations.
understanding nested loops
a nested loop has an outer loop and an inner loop. the outer loop runs once for each iteration of the inner loop. this means that for each iteration of the outer loop, the inner loop will execute completely.
syntax of nested loops
here's the general structure of nested loops in python:
example: multiplication table
let’s consider an example to illustrate nested loops by generating a multiplication table.
explanation of the example
1. *outer loop (`for i in range(1, rows + 1)`):*
- iterates over the range of numbers from 1 to 5 (inclusive). this represents the rows of the multiplication table.
2. *inner loop (`for j in range(1, cols + 1)`):*
- for each iteration of the outer loop, the inner loop runs through the range of numbers from 1 to 5 (inclusive). this represents the columns of the multiplication table.
3. *calculating product:*
- within the inner loop, the product of `i` (the current row number) and `j` (the current column number) is calculated.
4. *printing:*
- the product is printed with a space in between, and the `end=' '` parameter ensures that the output stays on the same line. after the inner loop completes, a new line is printed to move to the next row of the multiplication table.
output of the example
when you run the above code, the output will be:
use cases for nested loops
nested loops can be particularly useful in various scenarios, such as:
1. *working with multi-dimensional lists:*
- accessing elements in a list of lists (e.g., a matrix).
2. *generating combinations:*
- creating combinations of items from multiple lists.
3. *searching or sorting algorithms:*
- implementing algorithms like bubble sort, selection ...
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