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scope of a variable is the part of the code within which the variable is defined or the part of your code within which the th variable can be used for example

#include<stdio.h>

void main()

{

int variable1

}

now this variable (variable1) that we have used can be used anywhere within the main function .but if i write a code as shown below

#include<stdio.h>

void function1(int a)

void main()

{

int variable1

}

void function1(int a)

{

sum=variable1+variable1;

}

the compiler wouldn't know what variable1 ,being used in function1 is.

we therefore say that variable1 has a scope within the main only

if however we would have written int 'variable1' immediately after #include<stdio.h> then 'variable one would have been a global variable and could have been used anywhere within the code

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