[Solved] How do I size and sapce

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For problems like these, try to associate the output with its indices (or in this case, current_row). Also, it seems like it’s better to start from 0 for this one.

0:                                   1
1:                           2       *       3
2:                   4       *       *       *       5
3:           6       *       *       *       *       *       7
4:   8       *       *       *       *       *       *       *       9

max_row is 5, current_row is from 0 to 4.
There are max_row - current_row - 1 spaces on each row.
There are 2 * current_row - 1 stars on each row.
The numbers on the left is just twice current_row, or 2 * current_row. This is true for all except 0. We could use an if statement for that special case.
The numbers on the right is just left + 1, or 2 * current_row + 1.

space="\t"
star="*"
size = int(input("Enter number to make triangle: "))

def printRow(current_row, max_row) :
    star_count = 2 * current_row - 1

    line = space * (max_row - current_row - 1)

    if current_row == 0 :
        line += "1"
    else :
        line += str(2 * current_row) + space

    line += (star + space) * star_count

    if current_row > 0 :
        line += str(2 * current_row + 1)

    print(line)

if size <= 0 :
    print("The value you entered is too small to display a triangle")

for i in range(0, size) :
    printRow(i, size)

solved How do I size and sapce