String to Integer in Different Programming Languages

Below are example programs to do string to integer conversion in different programming languages.

String value = 12546
Integer value = 12546
String value = GeeksforGeeks
Integer value = 0

Complexity Analysis of Standard Functions

Below is a typical time complexity analysis of the library functions

• Time Complexity: O(n), Only one traversal of the string is needed.
• Space Complexity: O(1), As no extra space is required.

Detailed Articles for Different Languages:

Below are detailed articles in different programming languages to do string to integer conversion.

String to Integer in C/C++
String to Integer in Java
String to Integer in JavaScript
String to Integer in Python
String to Integer in C#
String to Integer in PHP

How to implement your own conversion?

We need to write a function that takes a string as an argument and returns its equivalent integer value. Please refer the below post for details.

Write your own string to integer converter.