while sentence

[nilamo]

Welcome to the forums :)

The syntax highlighting should make it clear, but line 5 is a syntax error. There's a single quote in the middle of the string that ends the string prematurely. Either wrap the string in double quotes, or in triple quotes:

#currently
ans=str(input('if Javab is higher please enter k and  it is lower please enter b and if it's equal enter d'))

# double quotes
ans=str(input("if Javab is higher please enter k and  it is lower please enter b and if it's equal enter d"))

# triple quotes
ans=str(input('''if Javab is higher please enter k and  it is lower please enter b and if it's equal enter d'''))

Also, the last line will overwrite the print() function with "yes it's true" instead of printing anything. The assignment is almost definitely a typo.

If those don't fix your issue, please share the traceback Python gives, or explain what the issue is if it's logical instead of syntactical.