Conditional Statements

  #include⁢stdio.h>
  main()
  {
    int a;
    int x , y ;
    printf("Enter a Number ") ;
    scanf("%d",&a) ;
    if(a>=10 && a<=99)
    {
        printf("It is a 2 digit number") ;
        x =a%10;
        y =a/10;
        if(x==y)
            printf("Both digits are same") ;
        else
            printf("Both digits are not same") ;
    }
    else
        printf("It is not a 2 digit number") ;

  }

  #include⁢stdio.h>
  main()
  {
    int a;
    int n1,n2,n3,n4;
    printf("Enter a Number ");
    scanf("%d",&a);
    if(a>=1000 && a<=9999)
    {
        printf("It is a 4 digit number");
        n1=a%10;
        n2=a/10%10;
        n3=a/100%10;
        n4=a/1000;
        if(n1+n2==n3+n4)
            printf("Sum is same") ;
        else
            printf("Sum is not same") ;
    }
    else
        printf("It is not a 4 digit number");

  }

  #include⁢stdio.h>
  main()
  {
    int a,b,c;
    printf("Enter 3 Angles ");
    scanf("%d %d %d",&a,&b,&c);
    if(a+b+c==180)
    {
        printf("Triangle can be formed");
        if(a==b || b==c || c==a)
            printf("\nIso. Triangle");
        if(a==b && b==c)
            printf("\nEq. Triangle");
        if(a==90 || b==90 || c==90)
            printf("\nRightAngled Triangl");
    }
    else
        printf( "Triangle cannot be formed" );
  }