Features
To begin with, the A640 boasts a whopping 10 megapixel camera resolution, which is more than enough by any standards. Being a compact camera the optical zoom level is limited to 4x (35mm-140mm), but that's still better than the standard 3x zoom that most other compact cameras in this range offer.
A640 also has numerous shooting modes—21 to be exact—which includes underwater (used only with the add-on underwater housing accessory, sold separately), party, snow beach and the two modes that are unique to Canon cameras—Color Swap and Color Accent.
Color Swap mode allows you to switch any color in the scene with any other color. For example, the wall in the first picture shows it's original yellow color, but using the Color Swap mode I have replaced all the yellow color in the image with red, on the fly.
Wall color changed to red using the color swap mode
Color Accent allows you to click an image in black and white, while keeping a color (selected by the user) intact. Check out the picture I clicked of the Superman action figure below where I've kept the yellow color intact.
The above two features are not necessary and can be easily done better in Photoshop, but they're definitely a hell lot entertaining.
The A640 features a macro mode that can focus up to 1cm, which can be seen in the shot I took below.
Like other Canon compact cameras the A640 boasts manual focus along with the manual exposure features. The manual focus feature really comes in handy especially in low light situations, where focusing on the subject can get a bit dicey.
Though the A640 doesn't really feature anything unique or groundbreaking, it still boasts an impressive package that makes it appealing to casual as well as serious users.
I want to know the price of canon A640 and from where i can get this in delhi and do you provide warranty on this model (A640) 
