Letter Arrow with For Loop in Python-CodePudding

I have a homework to make an arrow letter with nested for loop in Python. The goal is to make an arrow that starts with input letter and the input maximum size; for example, input C for letter and 5 for size the output should be like this

C
D D
E E E
F F F F
G G G G G
H H H H H
I I I I
J J J
K K
L

I'm having a problems with making it starts with the input letter, and make it have maximum for 2 rows. This is what I got so far (since when I change the variable to make it starts with input letter the code is error).

letter = (input("What is the starting letter? "))
size = int(input("What is the maximum size of the arrow? Please enter an integer: "))


val = 65
for x in range(0,size):
    for y in range (0,x 1):
        char = chr(val)
        print (char, end = " ")
    val = val   1
    print()

for x in range(size,0,-1):
    for y in range (0,x-1):
        char = chr(val)
        print (char, end = " ")
    val = val   1
    print()

When I run this, it look like this

What is the starting letter? C
What is the maximum size of the arrow? Please enter an integer: 5
A 
B B 
C C C 
D D D D 
E E E E E 
F F F F 
G G G 
H H 
I

CodePudding user response：

the reason why it starts with A is because u have val set to 65 i.e ascii value for A

use

val = ord(letter)

instead of

val = 65

this should now work as intended

ord - returns the string to its ascii value of the string

CodePudding user response：

The letter variable has not been used in the rest of the code. You should do something like:

letter = (input("What is the starting letter? "))
size = int(input("What is the maximum size of the arrow? Please enter an integer: "))


val = ord(letter)
for x in range(0,size):
    for y in range (0,x 1):
        char = chr(val)
        print (char, end = " ")
    val = val   1
    print()

for x in range(size,0,-1):
    for y in range (0,x-1):
        char = chr(val)
        print (char, end = " ")
    val = val   1
    print()

Example output

What is the starting letter? C
What is the maximum size of the arrow? Please enter an integer: 5
C 
D D 
E E E 
F F F F 
G G G G G 
H H H H 
I I I 
J J 
K

Note that, this won't work with an input like Z as the character and 4 as the number.

Wrong Output

What is the starting letter? Z
What is the maximum size of the arrow? Please enter an integer: 4
Z 
[ [ 
\ \ \ 
] ] ] ] 
^ ^ ^ 
_ _ 
`

CodePudding user response：

I missed the point in setting variables, at first. The result is all correct now, and it looks like this

letter = (input("What is the starting letter? "))
size = int(input("What is the maximum size of the arrow? Please enter an integer: "))

val = ord(letter)
for x in range(0,size):
    for y in range (0,x 1):
        char = chr(val)
        print (char, end = " ")
    val = val   1
    print()

for x in range(size,0,-1):
    for y in range (0,x):
        char = chr(val)
        print (char, end = " ")
    val = val   1
    print()

changing the val = 65 to val = ord(letter) and change thex-1to x to make 2 rows of maximum. Thank you for all the answers.