![]() By following the steps outlined in this post, you can easily convert a string to a long integer in C and use it in your programs. These functions provide a convenient way to convert strings to long integers in various programming tasks. ![]() In summary, converting a string to a long integer in C is a simple task that can be accomplished using the strtol and strtoul functions. The endptr pointer is used to store the position of the first invalid character in the string after the conversion. The resulting long long integer is stored in the num variable. In this example, the string “1234567890123456789” is converted to a long long integer using the strtoll function with a base of 10. Long long num = strtoll(str, &endptr, 10) Here is an example code snippet that demonstrates how to use the strtoll function to convert a string to a long long integer: char str = "1234567890123456789" The easiest way to do this is by using the std::stoi() function introduced in C++. Example C code to convert a string to a long long int We can convert string to int in multiple ways. These functions have the same signature as strtol and strtoul, but they return a long long integer or an unsigned long long integer instead. This approach is popular in current versions of C++, as it was first introduced in C++11. If you need to convert a string to a long long integer or an unsigned long long integer, you can use the strtoll and strtoull functions respectively. String to int Conversion Using stoi () Function The stoi () function in C++ takes a string as an argument and returns its value in integer form. Note that if the string being converted is not a valid long integer or if the value overflows/underflows the range of a long integer, the functions will return LONG_MAX or LONG_MIN respectively. The resulting long integer is stored in the num variable. In this example, the string “12345” is converted to a long integer using the strtol function with a base of 10. Here is an example code snippet that demonstrates how to use the strtol function to convert a string to a long integer: char str = "12345" The base of the number system used in the string (0 for auto-detection, 2-36 for binary to base-36) Example C code to convert a string to a long int.A pointer to a char pointer that points to the first invalid character in the string after the conversion.The strtol function converts a string to a long integer, while strtoul converts a string to an unsigned long integer. The strtol and strtoul functions are part of the C standard library and are used for converting strings to long integers. Example C code to convert a string to a long long int. ![]()
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