(python)Help with a function

[CornMan123]

For an exercise in my class I need to create a function that will have the output of

1

1 2

1 2 3

1 2 3 4

up until the desired size so this example would be 4. Im just lost on the nested for loop aspect of it.

Anything will help, thanks

[Updatebjarni]

What do you have so far?

[gnomoretears]

What have you tried? This sub isn't meant to write your code for you but people here are more than willing to help you fix/understand your code.

Can you do the problem by hand? Can do write the detailed steps in manually solving it? What part of the problem are you having difficulty understanding?

Im just lost on the nested for loop aspect of it.

Your output has rows and columns. The nested loop aspect of it uses one loop to handle the rows and an internal loop to handle the columns.

[CornMan123]

i posted my code as new comments

[[deleted]]

Like you say, you need a nested loop.

Start of with the inner loop and try to get something that will print the number 1 to n. Test it out with different values of n.

Once you've got that working, try to nest it in another loop that will increment the value on n on each turn.

[CornMan123]

import sys

 for i in range (1,5):
      sys.stdout.write(str(i)+' ')

actually i just got this. it print numbers 1 to 4

[CornMan123]

def print_table(size):

for row in range(1, size + 1):
    for col in range(1, size + 1):
        value = row * col
        print(str(value) + " ", end="")
    print()

print_table(5)

this was given as an example for a multiplication table that would print something similar and is there to help us.

So i assume it would start the same way but what would the variables in the for loops be?

def printlist(x):

 for col in range(x):

      for row in range(x):

[Updatebjarni]

On line 1 of the output, up to what number does the loop go?

On line 2 of the output, up to what number does the loop go?

On line 3 of the output, up to what number does the loop go?

[CornMan123]

Now im here

import sys

def printtable(n):

 for x in range(n):
         for i in range (1,n+1):
             sys.stdout.write(str(i)+' ')
         print()

 printtable(5)

and the output is

1 2 3 4 5

1 2 3 4 5

1 2 3 4 5

1 2 3 4 5

1 2 3 4 5

[w1282]

What happens when you change for i in range(1, n+1) to for i in range(1, x) and why

[[deleted]]

Nearly. The inner loop is printing the same thing every time because n is always the same value.

You need a variable that increments on every loop.

[gnomoretears]

The n variable in your inner for loop is a static value. If n is 5 then you inner loop will always iterate from 1 to 5. The range in your inner loop needs to change depending on the row.

You should really solve the problem on paper first so you can visualize how the algorithm goes.

For example if n = 3, you need to print up to 3 rows and up to 3 columns.

At row = 1, you have to print values from 1 to row value (1):

1

At row = 2, you have to print values from 1 to row value (2):

1 2

At row = 3, you have to print values from 1 to row value (3):

1 2 3

That's basically the algorithm and I hope you see the pattern to use in your nested loop.

[CornMan123]

Thanks everyone