How to Convert an Integer to a String in C ?

Converting Integer to String in C : Alternatives to itoa()

In C , converting an integer to a string has several alternatives to the itoa() function, which may not be supported in all environments. Here are some alternative approaches:

std::to_string (C 11 and later):

#include <string>

std::string s = std::to_string(5);

std::stringstream (pre-C 11):

#include <sstream>

int i = 5;
std::string s;
std::stringstream out;
out << i;
s = out.str();

va_arg() with sprintf:

char s[256];
va_list valist;
va_start(valist, format);
vsnprintf(s, 256, format, valist);
va_end(valist);

snprintf:

char s[256];
snprintf(s, 256, "%d", i);

Depending on your development environment and C standard support, you can choose the most appropriate method to convert integers to strings in your code.

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