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Python 3 Program to Add Two Numbers Without Using + Operator in Terminal Tutorial For Beginners
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Jun 1, 2025
Get the full source code of application here:
View Video Transcript
0:00
uh hello guys welcome to this video so
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in this video I will show you a very
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common program which is asked inside
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competitive programming or interview
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whenever you go for any Python interview
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this question will be asked for you so
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this is actually how to add two numbers
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without using the plus operator without
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using the standard addition operator
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that you use a plus b you don't need to
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use that operator still you need to add
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two numbers so I will show you this
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program that I will explain you step by
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step so first of all inside Python we
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take two numbers number one I give it a
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seven number two I give it a value of
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five and now I just need to define a
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function which will be
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add without plus and here we pass these
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two numbers to this function number one
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number two so now we just need to define
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this function so this function
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essentially will not use this plus
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operator so now inside this
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function in the standard way what we do
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we use this plus operator which simply
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add these two numbers so the result
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comes out to be 12 so if I try to print
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this this is a standard way by which you
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add two numbers as you will see the
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result comes out to be 12 but in
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interview in competitive programming
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there will be this question will be
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asked that you don't need to use the
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standard plus operator instead you need
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to
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uh still add these two numbers without
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using it so now the approach is very
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simple here you first of all need to use
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some bitwise operations such as let me
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show you so here we simply put while and
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we basically check here while the B
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value is not equal to
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zero so here we put this condition
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inside while loop we are checking this
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if the number two which is passed here
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which is five it's not equal to zero
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then in that case we need to carry out
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these three process first of all we need
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to execute this a and b this is this is
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a special operator which is called as uh
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or
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operator which is called as s xor zor
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operator so first of all it actually
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convert both these numbers into binary
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which is how the CPU identify these
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numbers into binary 011 form both these
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numbers are converted into binary and
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then it carries calculate the carry and
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it stored it inside this variable if I
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want to just print out this carry you
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can print it out and then we also do
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this a this is a special operator which
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is the and operator we do this part as
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well and then b is equal to carry and
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this is a special operator one and then
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after that we return this value of
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a so if you try to run this program you
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will see the result still comes out to
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be 12 as you can
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see let me just eliminate this print
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statement and just say you can see the
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result comes out to be 12 here if I
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change this let's suppose I say 1 and 1
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so 1 + 1 comes out to be two you can see
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so this program basically we haven't
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using the plus operators still we are
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adding the two numbers so here these
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three operations we are doing it bitwise
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operators we are using the zor operator
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and
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the and operator this is the and
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operator that you are seeing this is the
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zor operator so both these numbers are
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converted into binary what we are not
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adding 1 + 1 we are converting this one
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into binary 1 0 1 form and then we are
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calculating the carry here first of all
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then we are putting the and operator and
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then again carry and then we are
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returning it so this is essentially the
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program you can pause and write this
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full program also check out my website
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freemediattools.com
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uh which contains uh thousands of tools