how to take command line arguments in c code example

Example 1: command line arguments in c

int main( int argc, char *argv[] )
./a.out kiran kumar gun
./a.out is arg[0]
kirna is arg[1]

Example 2: command line arguments c

int main(int argc, char* argv[]){/*...*/}

Example 3: check command line input is a number in c

bool isNumber(char number[])
{
    int i = 0;

    //checking for negative numbers
    if (number[0] == '-')
        i = 1;
    for (; number[i] != 0; i++)
    {
        //if (number[i] > '9' || number[i] < '0')
        if (!isdigit(number[i]))
            return false;
    }
    return true;
}