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Add "Memory Allocation in Array" (#21234)

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* Add "Memory Allocation in Array"

* fix: formatting, grammar and example

* fixed grammar, cleaned up table
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Pawan Bangar
2018-11-09 12:57:24 +05:30
committed by Niraj Nandish
parent 1173ee166a
commit 9372b49bb9
1 changed files with 18 additions and 0 deletions
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guide/english/c/arrays-and-strings/index.md
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@ -63,6 +63,24 @@ int main(void) {
return 0; return 0;
} }
``` ```
## Memory Allocation In Array
Normally variables occupy memory in a Random Manner, i.e. if I declare
```C
int a;
float b;
```
`a` and `b` are each assigned a random memory address (e.g. 3004 and 5006). That doesn't happen in the case of an array.
Let's consider an example:
If the first element is assigned memory address 2000, then the second will be assigned 2002 if it is an `int` array.
Memory allocation is continuous in Arrays, not random like variables.
As an example, consider an array `a[4]`, which contains 5 elements:
| Position | 0 | 1 | 2 | 3 |
|:---------|:--:|:--:|:--:|:--:|
| Value | 1 | 5 | 3 | 6 |
| Address |2000|2002|2004|2006|
## Strings ## Strings
Arrays are sets of variables of the same data type, and strings are sets of characters. As a result, we can represent strings with an array. You _can_ declare something in the same way as before, but you'll need to place '\0' as one of your values (more on that in a minute!): Arrays are sets of variables of the same data type, and strings are sets of characters. As a result, we can represent strings with an array. You _can_ declare something in the same way as before, but you'll need to place '\0' as one of your values (more on that in a minute!):