Why Return 0 is used in C
Return 0 :
Return 0 in C signifies that the program has been implemented successfully, allowing the processor to be uploaded. Because the return void command would be executed right away when the program’s implementation was terminated
Why Return 0 ? :
- Since the main function (int main()) returns a numeric number, we are return 0.When a function returns a result, the word “return” is used.
- As a result, we may utilise the return statement to conclude the main function because the program has been correctly completed.When the primary function’s data type is “integer,” it must provide a result.
- Therefore, we just use return 0.The primary function will be of data type “void,” hence nothing will need to be provided.The return value is the program’s exit code.
Examples of Return 0 : :
Let,s see some example for better understanding :
Example 1:
Run
#include<stdio.h>
int main() {
int val1 = 20;
printf("val1 : %d\n",val1);
return 0;
}
Output :
val1 : 20
What Happened Above?
In the program, return 0 is used means program is executed successfully.
Example 2 :
Run
#include<stdio.h>
int *help(){
int val = 20;
return &val;
}
int main() {
int *ptr = help();
printf("%d", *ptr);
return 0;
}
Output :
Segmentation fault
What Happened Above?
In the program, return 0 is used in main function which means program is executed successfully and also in help function to return value from function.
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