Pyramid in C

pyramid.c

#include<stdio.h>
int main() {
    int i, j, spaces = 0, sc, n = 0;
    int k = 1;
    
    printf("Enter Number of Lines = ");
    scanf("%d",&n);
    
    spaces = n - 1;
    
    for (i = 1; i <= n; i++) {
        for (sc = spaces; sc >= 1; sc--) {
            printf("   ");
        }
        for (j = 1; j <= i; j++) {
            printf("%3d", k);
            k--;
        }
        k=i+j+k;
        printf("\n");
        spaces--;
    }
    return 0;
}