Convert Integer or Float or Double to String
In C programming, an integer or a float or a double can be converted into a string using the sprintf() function
The sprintf() function is used to format and store a series of characters and values in a string buffer. It stands for "String Print Formatted".
Different format specifiers are used to convert different data types.
The sprintf() takes 3 arguments: string buffer like char array, format specifier, and data to be formatted/converted.
Convert Integer into String in C
In C programming, use "%d" format specifier to convert an integer into a string using the sprintf() function as demontrated in the following example:
Examples of Converting Integer into String
Example explained
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int intNum = 1225;: The line declares an integer variable named 'intNum' and assigns value 1225. -
char stringVar[10];: It declares a char array variable named 'stringVar'. -
sprintf(stringVar, "%d", intNum);: It converts the integer value of 'intNum' variable into string type and stores converted value in the 'stringVar'. "%d" is the format specifier for integer data type. -
printf("%s is a converted string.", stringVar);: It prints the converted string data.
Convert Float into String in C
In C programming, use "%f" format specifier to convert a float type into a string type using the sprintf() function as demontrated in the following example:
Examples of Converting Float into String
Example explained
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float floatNum = 12.314;: The line declares a float variable named 'floatNum' and assigns value 12.314. -
char stringfloatVar[10];: It declares a char array variable named 'stringfloatVar'. -
sprintf(stringfloatVar, "%f", floatNum);: It converts the float value of 'floatNum' variable into string type and stores converted value in the 'stringfloatVar'. "%f" is the format specifier for float data type. -
printf("%s is a converted string.", stringfloatVar);: It prints the converted string data.
Convert Double into String in C
In C programming, use "%lf" format specifier to convert a double type into a string type using the sprintf() function as demontrated in the following example:
Examples of Converting Double into String
Example explained
-
double doubleNum = 12.314;: The line declares a double variable named 'doubleNum' and assigns value 12.314. -
char stringdoubleVar[10];: It declares a char array variable named 'stringdoubleVar'. -
sprintf(stringdoubleVar, "%lf", doubleNum);: It converts the double value of 'doubleNum' variable into string type and stores converted value in the 'stringdoubleVar'. "%lf" is the format specifier for double data type. -
printf("%s is a converted string.", stringdoubleVar);: It prints the converted string data.
