What is the use of atoi function in c

Question

I don't understand the concept please give me an explanation with example

Answer 1

char
number
atoi

Answer 2

~ swim ~ it returns 0 i think if the string is not digit

Answer 3

Converts an string to integer.

Answer 4

Gayathri Manalan - or + are valid chars for atoi. atoi("-56") retuns -56

✳AsterisK✳ undefined behaviour if the number is out of range. But if not a number it returns zero as ~ swim ~ said...

atoi("555555555555555") --> undefinded

atoi(" -56") --> -56

atoi("fghi") --> 0

:)

Answer 5

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
int main ()
{
int val; char str[20];
strcpy(str, "98993489");
val = atoi(str);
printf("String value = %s, Int value = %d\n", str, val);
strcpy(str, "hello");
val = atoi(str);
printf("String value = %s, Int value = %d\n", str, val);
return(0);
}

Run this code using numbers and alphabetic. You will understand better.

Answer 6

In simple words "654" value is not equal to 654.
So it converts "654" to 654 value...😉😉😉😉

Answer 7

It stands for ASCII to Integer.

Answer 8

the atoi() converts a string to an integer and atoi() skips all white-space characters at the beginning of the string.

Answer 9

char
number
atoi