ALGORITHM TO FIND SUM OF FIRST N NUMBERS USING FOR AND WHILE

Method 1 (FOR)

              STEP 1.       Set I <-- 0, N <-- 0, Sum <-- 0

STEP 2.       Read N

STEP 3.       Repeat for I = 0, 1, … N – 1

  Begin

Sum <-- Sum + I

  End

       STEP 4.       Print Sum


Method 2(WHILE)

STEP 1.       Set I <-- 0, N <-- 0, Sum <-- 0

STEP 2.       Read N

STEP 3.      while (I<=N-1)

  Begin

Sum <-- Sum + I
I<-- I+1

  End

STEP 4.       Print Sum