convert string to int c

Converting a String to an Integer in C

To convert a string to an integer in C, you can use the atoi function from the standard library. Here are the steps to convert a string to an integer:

1. Include the necessary header file: c #include <stdlib.h>

2. Declare a string variable to hold the input: c char str[] = "12345";

3. Use the atoi function to convert the string to an integer: c int num = atoi(str);

The atoi function takes a string as input and returns the corresponding integer value. If the string cannot be converted to an integer, atoi will return 0.

1. Print the converted integer: c printf("The converted integer is: %d\n", num);

This will display the converted integer value.

Here's the complete code:

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

int main() {
    char str[] = "12345";
    int num = atoi(str);
    printf("The converted integer is: %d\n", num);
    return 0;
}

This code will output:

The converted integer is: 12345

Please note that the atoi function has some limitations. It will stop converting the string as soon as it encounters a non-digit character. If the string contains non-digit characters at the beginning, atoi will return 0. If the string contains non-digit characters in the middle, atoi will convert the digits before the non-digit characters and ignore the rest.