KwickClips Java · 42 sec · free
Why is postfix easier for a computer?
Short answer. It needs no brackets and can be read once from left to right.
What is the postfix of A + B?
A B +.
Why notation matters
| Infix needs brackets and precedence |
| Postfix needs no brackets |
| Read once, left to right |
Remember
| Infix: A + B |
| Postfix: A B + |
| Computers prefer postfix |
Why would a computer rewrite A plus B as A B plus? Three reasons. Infix needs precedence and brackets. Postfix needs none. A stack reads it once, left to right. Infix puts the operator between. Postfix puts it after. Computers like it.
This clip is from the full lesson: Infix, Prefix and Postfix Expressions — 7 minutes, with the tables, the quick answers and the whole lesson in text.
Useful for: ICSE Class 9 Computer Applications, ISC Class 12 Computer Science (868)
More KwickClips from this lesson
Which operator is placed first when converting?43 sec
What do you do when you read an operand?39 sec
Which popped value is the left operand?43 secVoice-over is AI-generated; the script is written and checked by Kajal Ma'am. Confirm anything you plan around against your official board document. We never ask for a password or an OTP.