pow in c

What is pow in c programming?

The function pow in c is used to calculate power of a number w.r.t. given base value.

This function is defined in math.h header file.

Prototype

#include<math.h>
double pow(double value1,double value2);

Parameters of pow in c

pow function takes two double type values as input parameters.

Return value of pow in c

This function returns power raised of a given number w.r.t. given base value.

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Example program for pow in c

Example1

#include<stdio.h>
#include<math.h>
int main()
{
  double val1=20,val;
  double val2=2;
  val=pow(val1,val2);
  printf("\n\n\tThe result is %lf \n\n",val);
  return 0;
}

While using gcc use below command to add math header.

gcc file_name.c -lm

Code explanantion

The power value of a given number is found by calling the pow function and the result is stored in a variable. This result is printed on to the console.

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Example2

#include<stdio.h>
#include<math.h>
int main()
{
  double x,y,res;
  printf("\n\n\tEnter the values of x,y \n\t");
  scanf("%lf %lf",&x,&y);
  res=pow(x,y);
  printf("\n\tThe result is %lf \n\n",res);
  return 0;
}

While using gcc use below command to add math header.

gcc file_name.c -lm

Code explanation

The power of a number that is inputted from the user is found by calling the pow function. The result is printed on to the console.

pow() Man page

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Difference between pow and sqrt in c

pow is used to calculate the power of a number raised to the base value. sqrt function is used to calculate the square root of a given number.

pow function takes two arguments. sqrt function takes one argument.

Prototypes are as follows

double pow(double value1,double value2);

double sqrt(double value1);

pow in c	sqrt in c
Used to calculate power of a number raised to the base value.	Used to calculate square root of a given number.
double pow(double value1,double value2);	double sqrt(double value1);

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Difference between pow and exp in c

pow is used to calculate the power of a number raised to the base value. exp function is used to calculate the exponential value of a given number.

pow function takes two parameters. exp function takes one parameter.

Prototypes are as follows

double pow(double value1,double value2);

double exp(double value1);

pow( )	exp( )
Used to calculate power of a number raised to the base value.	Used to calculate exponential value of a given number.
double pow(double value1,double value2);	double exp(double value1);
Takes two parameters.	Takes one parameter.

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