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How to calculate power of a number in c

How to write power in c

#include<stdio.h>
int main(){
  int pow,num,i=1;
  long int sum=1;
  printf("\nEnter a number: ");
  scanf("%d",&num);
  printf("\nEnter power: ");
  scanf("%d",&pow);
  while(i<=pow){
            sum=sum*num;
            i++;
  }
  printf("\n%d to the power %d is: %ld",num,pow,sum);
  return 0;
}


 output:
Enter the number: 5

 Enter the  Power:6
  5 to the power 6 is :  15625
 

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