Swap of the Two Numbers

#include<stdio.h>
int main()
{
    int a;
    int b;
    int c;
    
    printf("Type value of A : ");
    scanf("%i",&a);
    printf("\nType value of b : ");
    scanf("%i",&b);
    c=a;
    a=b;
    b=c;
    printf("A : %i",a);
    printf("\nb : %i",b);
    return 0;
}                                                      Run Code

#include <stdio.h>
int main()
{
    int n,i,j;
    scanf("%d",&n);
    for(i=1;i<=n;i++)
    {
        for(j=1;j<=i;j++)
        {
            printf("%d",j);
        }
            printf("\n");
    }
    return 0;
}                                                     Run Code

#include <stdio.h>
int main()
{
    int n,i,j;
    scanf("%d",&n);
    for(i=1;i<=n;i++)
    {
        for(j=1;j<=i;j++)
        {
            printf("%d",j);
        }
            printf("\n");
    }
    return 0;
}                                                     Run Code