ATOI()

this function is used to convert strings into integer (int) numeric values for further processing. this is useful when processing numeric input provided as strings, such as command-line arguments or user input.

int num = atoi("12345");

 * "12345" is converted to the integer 12345

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

int main() {
    char intStr[] = "456";
    char floatStr[] = "98.76";

    // Convert string to integer
    int num = atoi(intStr);

    // Convert string to floating-point number
    double val = atof(floatStr);

    printf("Integer value: %d\n", num);
    printf("Floating-point value: %.2f\n", val);

    return 0;
}