There are three ways to calculate powers: using the pow() function (fastest, but requires an external library), using a loop (simple, but inefficient), and using recursion (elegant, but may cause stack overflow).
How to use C language to calculate power
Use the pow() function directly
<code class="c">#include <math.h>
int main() {
double base = 2.0;
int exponent = 3;
double result = pow(base, exponent);
printf("(%f) ^ %d = %f\n", base, exponent, result);
return 0;
}</code>Use loops
<code class="c">int main() {
double base = 2.0;
int exponent = 3;
double result = 1.0;
for (int i = 0; i < exponent; i++) {
result *= base;
}
printf("(%f) ^ %d = %f\n", base, exponent, result);
return 0;
}</code>Use recursion
<code class="c">double power(double base, int exponent) {
if (exponent == 0) {
return 1.0;
} else if (exponent < 0) {
return 1.0 / power(base, -exponent);
} else {
return base * power(base, exponent - 1);
}
}
int main() {
double base = 2.0;
int exponent = 3;
double result = power(base, exponent);
printf("(%f) ^ %d = %f\n", base, exponent, result);
return 0;
}</code>Which method you choose depends on performance and code readability .
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