TECHNICAL RESTRICTIONS OR TECHNICAL ERRORS

 TECHNICAL RESTRICTIONS :

TECHNICAL RESTRICTIONS OR TECHNICAL ERRORS

• variable starting with a number

 imagine you are used variables names like 2names,user@site,and class in your code, but you keep getting errors upon execution. why because these are the keywords in the PYTHON language . 

we see the technical restrictions and understand the restrictions. and also find  the solutions of the restrictions .

variable starting with a number

CODE : 

1. 2names = "iron man"      ------variable start with a number 2
2. print(2names)

output :

line 1 : 

2names = "iron man"

^^

<SYNTAX ERROR : invalid decimal literal

Initial variable rules

variables names should start with a letter either in lower case or in upper case or an underscore . numbers can be used later , but not as first character. so use two_names instead of 2names  .  

variable string with a alphabet characters

1. two_names = "iron man"
2. print(two_names)

output :

 iron man ---desired output

• variables starting with special characters

variable name can have letters a to z , numbers 0 to 9 , and underscore _ . NO special characters or spaces are permitted in variable names. 

CODE : 

user@site = "proinpythonlng.blogspot.com"

print(user@site)

output : 

line 1

user@site = "proinpythonlng.blogspot.com"

^^^^^^^^

Syntax error : cannot assign an expression here. may your mistake @

 

instead of this using user_site

The corrected code is 

CODE : 

user_site = "proinpythonlng.blogspot.com"

print(user_site)

output : 

proinpythonlng.blogspot.com

• Safe variable naming

words like 'class' is a special keyword in python just like 'print' and should not be used as variable names . avoid using it to avoid errors

code : 

class = "rolex"

print(class)

output :

class = "rolex"

^^^^^^^^^

syntax error : invalid syntax or bad input in line 1

learn using the it right way 

instead of this using class_name

code : 

class_name = "rolex"

print(class_name)

output :

rolex   ----desired output

Avoiding common errors :

you assigned "squid game" to a variable called name. But when you print "Name", its showing error 

code ;

name = "squid game"

print(Name)

output :

<Name error : name "Name" is not defined on line 2>

you must and should print as what you assigned as variable. 

code :

first_name = "tony"

last_name = "stark"

print(first_name+" "+last_name)

output : 

tony stark

• You have to must try in your python compiler use idle avoid online compilers to Errors

• Quiz about Arithmetic Operations In Python

https://proinpythonlng.blogspot.com/2025/06/quiz-about-arithmetic-operations-in.html