The standard C library provides several functions for converting numbers of all formats (integers, longs, floats, and so on) to strings and vice versa The following functions can be used to convert integers to strings :
Function Name Purpose
itoa() Converts an integer value to a string.
ltoa() Converts a long integer value to a string.
ultoa() Converts an unsigned long integer value to a string.
The following functions can be used to convert floating-point values to strings :
Function Name Purpose
ecvt() Converts a double-precision floating-point value to a string without
an embedded decimal point.
fcvt() Same as ecvt(), but forces the precision to a specified number of
digits.
gcvt() Converts a double-precision floating-point value to a string with an
embedded decimal point.