WAP to print Pascal triangle with number of lines input by user.

#include<stdio.h>
 #include<stdlib.h>

 int factorial(int);
 int main(){
 int n,i,j;
printf("Enter the no. of lines of pascal's triangle ");
 scanf("%d",&n);
for(i=0;i<n;i++)
 {
 for(j=0;j<n-i-1;j++)
 printf(" ");
for(j=0;j<=i;j++)
 printf("%d ",factorial(i)/(factorial(j)*factorial(i-j)));
printf("\n");
 }
 system("pause");
 return 0;
 }
int factorial(int num)
 {
 int i,f=1;
 for(i=1;i<=num;i++)
 f=f*i;
 return f;
 }
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