Converting a string to an Integer in C

To convert any char string to an integer, include stdlib.h and use the function:
int atoi(const char *nptr);
see man 3 atoi

/*example*/
#include <stdlib.h>
int main(int argc, char **argv){
	return(atoi(argv[1]));
}
/*check the return status (for linux/bash: echo $? )*/
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