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C Exercises: Get the environment string

C Variable Type : Exercise-9 with Solution

Write a C program to get the environment string.

Sample Solution:

C Code:

#include<stdio.h>
#include<stdlib.h>

int main ()
	{
		char * PathPtr;
		
		PathPtr = getenv ("PATH");

		if (PathPtr!=NULL)
			printf ("\nThe set path is: %s\n\n",PathPtr);

		return 0;
    }

Sample Output: 

The set path is: /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games

Flowchart:

C Exercises Flowchart: Get the environment string

C Programming Code Editor:

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C Programming: Tips of the Day

Static variable inside of a function in C

The scope of variable is where the variable name can be seen. Here, x is visible only inside function foo().

The lifetime of a variable is the period over which it exists. If x were defined without the keyword static, the lifetime would be from the entry into foo() to the return from foo(); so it would be re-initialized to 5 on every call.

The keyword static acts to extend the lifetime of a variable to the lifetime of the programme; e.g. initialization occurs once and once only and then the variable retains its value - whatever it has come to be - over all future calls to foo().

Ref : https://bit.ly/3fOq7XP