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Lecture 2 Write Your First Program In C++

This is the 2nd lecture of our DSA series
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This is how the compilation process work So it is compiler
which makes it possible for us to run a source code
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Courses are available in both Hindi and English
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There are many IDEs out there CodeBlocks, VsCode and many more - which you do n't even need to install Replit is one of
them
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In C++, many namespaces
are there which have cout functions in them so if we want to use cout , we have to add this
file to our code
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If you will
use > > by mistake by mistake, then it will give you compilation error So we use this operator
to display output
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Whenever you have to story any
information or data in the memory
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For eg- int a = 5, a is a variable in memory which is of int type and it has
value 5 in it
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There is a function named sizeof , which will tell you about the space being used by any
variable
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We have a way to story multiple characters
but we will see that in upcoming lectures
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We will just store binary form of ASCII value of any character
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This process of converting one data type into another
is known as type casting
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Let 's say the
number is -5 1st - Ignore the negative sign 2nd - Convert into binary representation = 101
3rd - Take 2 's complement and store it Now we can store negative numbers simply too, by
just using their first bit as their sign
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2/5 will give 0 and not 0
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To get answer in float, store it in a float variable
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logical operators have & &
and & is used to check multiple conditions
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We
know what things to keep in mind while dividing , how to store negative numbers & &
operators and ! operators
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We will do Bitwise operators later

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