Vijay Krishnavanshi
Open Source Developer at KDE
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Questions From Previous Class
Variables:
Do you Really get it?
Variables are simply names used to refer to some location in memory – a location that holds a value with which we are working.
Location can hold any thing.
Its upto us to decide what it holds.
Notion
What are Data Types?
&
Why do we need them?
Data Type:
Type of data that memory location or variable will hold
Trend that you should have noticed while writing code:
Syntax
data_type v1=a1 ,v2=a2 ,.... ;
v1 = name of variable
a1 = value of variable v1
.
.
so on
Problem
How to name a variable?
Function
printf
Output
scanf
Input
Let's Formally Define it:
printf( "You can get anything printed" )
Part inside the braces is stream at least this is how we know it.
Type Specifiers:
They are more like names how computer sees them.
- '%d' for integers
- '%s' for strings
- '%f' for floats
- '%lf' for double
- '%c' for characters
Its more like Fill in the Blanks
Question
Why do we need them?
Answer : to tell computer what comes next
Syntax
printf( " some string %d some string", v1 );
in the string or characters in between double quotes %d tells the compile that this data is missing and its most likely at the end before the braces.
So now you can guess what v1 should be?
See the bigger picture
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By Vijay Krishnavanshi
