Local variables scope is confined within the block or function where it is defined. Local variables must always be defined at the top of a block.
When a local variable is defined - it is not initalised by the system, you must initalise it yourself.
When execution of the block starts the variable is available, and when the block ends the variable 'dies'.
Syntax:return_type function_name(){
int a; //local variable
return value
}
Example:main()
{
int i=4;
int j=10;
i++;
if (j > 0)
{
/* i defined in 'main' can be seen */
printf("i is %d\n",i);
}
if (j > 0)
{
/* 'i' is defined and so local to this block */
int i=100;
printf("i is %d\n",i);
}/* 'i' (value 100) dies here */
printf("i is %d\n",i); /* 'i' (value 5) is now visable.*/
}
This will generate following output
i is 5
i is 100
i is 5
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