GeeksforGeeks
geeksforgeeks.org › dsa › convert-string-to-integer-without-using-any-in-built-functions
Convert string to integer without using any in-built functions - GeeksforGeeks
July 15, 2025 - // Java program for the above approach class GFG{ // Function to convert string to // integer without using functions public static void convert(String s) { // Initialize a variable int num = 0; int n = s.length(); // Iterate till length of ...
Python map() function
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Enumerate() in Python
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Read JSON file using Python
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Adding New Column to Existing DataFrame in Pandas
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GeeksforGeeks
geeksforgeeks.org › dsa › write-your-own-atoi
String to Integer - Write your own atoi() - GeeksforGeeks
Traverse the string from left to right, skipping whitespaces, handling the optional sign, and building the number digit by digit. At each step, ensure the value stays within 32-bit integer limits to avoid overflow.
Published: April 14, 2026
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GeeksforGeeks
geeksforgeeks.org › java › different-ways-for-string-to-integer-conversions-in-java
Different ways for String to Integer Conversions in Java - GeeksforGeeks
July 11, 2025 - public static Integer valueOf(String str) Parameters: This method accepts single parameter str of String type that is to be parsed. Return Value: The method returns an Integer object holding the value represented by the string argument.
GeeksforGeeks
geeksforgeeks.org › dsa › convert-a-string-to-an-integer-using-recursion
Convert a String to an Integer using Recursion - GeeksforGeeks
March 17, 2025 - Input: str = "0145" Output: 145 · To recursively converts a numeric string into an integer. It starts from the first character, extracts its numeric value, and multiplies it by the appropriate power of 10 based on its position.
YouTube
youtube.com › watch
GfG 160 | Day - 14 | String to Integer - Your Own atoi() | 160 Days Daily DSA Problem Solving | GfG - YouTube
Welcome to the daily solving of our GfG 160 Problem of Day 14 with Devashish Khare. We will discuss the entire problem step-by-step and work towards developi...
Published: November 29, 2024
Medium
medium.com › @chsiri469 › gfg-implement-atoi-1f02f0012a71
GFG - Implement Atoi. *** COMPANIES :MORGAN STANLEY, AMAZON… | by Sirisha Challagiri | Medium
February 2, 2024 - Given a string, s, the objective is to convert it into integer format without utilizing any built-in functions.
GitHub
github.com › Mohitbharti1998 › GFG › blob › main › Convert String to integer
GFG/Convert String to integer at main · Mohitbharti1998/GFG · GitHub
Your task is to implement the function atoi. The function takes a string(str) as argument and converts it to an integer and returns it.
Author: Mohitbharti1998
GeeksforGeeks
geeksforgeeks.org › how-to-convert-string-to-integer-in-python
How to convert string to integer in Python? | GeeksforGeeks
July 10, 2020 - If your string contains a decimal integer and you wish to convert it into an int, in that case, pass your string to int() function and it will convert your string into an equivalent decimal integer.
GeeksforGeeks
geeksforgeeks.org › python › convert-string-to-integer-in-python
Convert String to Int in Python - GeeksforGeeks
If the string contains non-numeric characters or is empty, int() will raise a ValueError. int() function automatically handles leading and trailing whitespaces, so int() function trims whitespaces and converts the core numeric part to an integer.
Published: June 15, 2026
LeetCode
leetcode.com › problems › string-to-integer-atoi
String to Integer (atoi) - LeetCode
Can you solve this real interview question? String to Integer (atoi) - Implement the myAtoi(string s) function, which converts a string to a 32-bit signed integer. The algorithm for myAtoi(string s) is as follows: 1. Whitespace: Ignore any leading ...
GeeksforGeeks
geeksforgeeks.org › c++ › c-program-to-convert-string-to-integer
C++ Program to Convert String to Integer - GeeksforGeeks
// C++ program to convert String into Integer #include <bits/stdc++.h> using namespace std; // function for converting string to integer int stringTointeger(string str) { int temp = 0; for (int i = 0; i < str.length(); i++) { // Since ASCII ...
Published: July 12, 2025
GeeksforGeeks
geeksforgeeks.org › videos › c-program-to-convert-string-to-integer
C Program to Convert String to Integer - GeeksforGeeks | Videos
Step 2: Iterating the for loop. Num = Num * 10 + (s[i]-'0') Step 3: Print the result. 2) Using In-built function atoi(): The atoi()function is defined inside stdlib.h header file.
Published: July 30, 2022
Views: 9K
GeeksforGeeks
geeksforgeeks.org › java › how-to-convert-string-to-int-in-java
String to int in Java - GeeksforGeeks
The most common method to convert a string to a primitive int is Integer.parseInt().
Published: July 23, 2025
YouTube
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Implement Atoi | GeeksForGeeks | Problem of the Day | Python | C++ - YouTube
Given a string s, the objective is to convert it into integer format without utilizing any built-in functions. Refer the below steps to know about atoi() fun...
Published: November 28, 2024
GeeksforGeeks
geeksforgeeks.org › go language › how-to-convert-string-to-integer-type-in-golang
How to Convert string to integer type in Golang? - GeeksforGeeks
July 12, 2025 - 1. Atoi() Function: The Atoi stands for ASCII to integer and returns the result of ParseInt(s, 10, 0) converted to type int. ... // Go program to illustrate how to // Convert string to the integer type package main import ( "fmt" "strconv" ) ...
GeeksforGeeks
geeksforgeeks.org › c language › c-atoi-function
atoi() Function in C - GeeksforGeeks
October 13, 2025 - The atoi() function accepts a string (which represents an integer) as a parameter and yields an integer value in return. Defined inside <stdlib.h> header file. ... #include <stdio.h> #include <stdlib.h> int main() { char str[] = "12345"; int ...
GeeksforGeeks
geeksforgeeks.org › c language › convert-string-to-int-in-c
Convert String to int in C - GeeksforGeeks
July 23, 2025 - Start traversing the string str from the front. For each character ch, check if they are numeric or non-numeric ASCII value using the range of numbers i.e. [48, 57]. ... Convert it to corresponding integer value using offset (-48) or simply '0'.
GeeksforGeeks
geeksforgeeks.org › problems › implement-atoi › 1
Implement Atoi | Practice | GeeksforGeeks
Given a string s, convert it into a 32-bit signed integer (similar to the atoi() function) without using any built-in conversion functions.The conversion follows these rules:Ignore Leading Whitespaces: Skip all leading whitespace characters