General code 1

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CODE NO:- 13

Q) Write a program to calculate the power of a number. 

 #LOGIC

Repeatedly multiply the given no. for p times where p is the given power.
For example: given(i/p) no.=2 and given(i/p) power=5
                       then the result will be 32 as 2^5=32
                       or (2*2*2*2*2=32).

 #Program( In C++):

 In  C++ language we use  ' // ' for Single line comment and /*---*/ for multi line comment
1st approach: Using for loop

 /**** Using for loop ***/
#include<iostream> // header file for i/p and o/p
using namespace std;
int main()
{
int n,m,i,re=1;
cout<<"\n enter no. and power:";
cin>>n>>m;
for(i=0;i<m;i++)
{
re=re*n;
}
cout<<"\n result is:"<<re;
return 0;
}

 We got this output by using DEV C++ (IDE)

2nd approach: Recursive approach

 /*** RECURSIVE APPROACH***/
#include<iostream>
using namespace std;
int power(int a,int b) //defining body of power funtion
{
if(b==0)
  {
  return 1;
}
else if(b==1)
{
return a;
}
else
{
return a*(power(a,b-1)); //recursive call
}  
}
int main()
{
  int n,m,result;
cout<<"\n enter no. and power:";
cin>>n>>m;
result=power(n,m); // calling the function power
cout<<"\n result is:"<<result;
return 0;
}

 We got this output by using DEV C++ (IDE)

Link: For other General Problems

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