If I provide input using input() it shows syntax error as given below but if I provide this value without input() it works,WHY?

Question

SOURCE CODE:

program=input('>')
exec(program)

> a=5\nb=4\nprint('sum: ',a+b) #input

OUTPUT:
Syntax error: unexpected character after line continuation character

Another method

program="a=5\nb=4\nprint('sum: ',a+b)"
exec(program)

OUTPUT:
sum: 9

Answer 1

Using input() function will modify an input like "\n" to "\\n". this causes the problem you have. as far as i know, you can not force to make your input a raw string, but you can create a new string by using the following code below.

Your input of:
"a=5\nb=4\nprint('sum: ',a+b)"
will be stored as:
"a=5\\nb=4\\nprint('sum: ',a+b)".

program=input(r'>')
#program = program.replace("\\n", "\n")
exec(program)

if you create a varibale like "a=5\nb=4\nprint('sum: ',a+b)", you can run the code without problems.