Subject : Structured Programming Approach

Title : Introduction to Computer, Algorithm and Flowchart

Marks : 4M

Given:

1) $(0010 \ 0100 \ 0010 \ 1101)_2 = (?)_{10}$

2 $(134)_{10} = (?)_{16}$

1) To Convert Base 2 to decimal:

$(0010 \ 0100 \ 0010 \ 1101)_2 = (?)_{10}$

1. Multiply the binary digits (bits) with powers of 2 according to their positional weight.
2. The position of the first bit (going from right to left) is 0 and it keeps on incrementing as you go towards left for every bit.

3. $0*2^{15}+0*2^{14}+1*2^{13}+0*2^{12}+0*2^{11}+1*2^{10}+0*2^9+0*2^8+0*2^7+0*2^6+1*2^5+0*2^4+1*2^3+1*2^2+0*2^1+1*2^0$

   $=0+0+8192+0+0+1024+0+0+0+0+32+0+8+4+1$

   $=9261$

   $(0010 0100 0010 1101)_2 = (9261)_{10}$

2) To Convert Decimal to Hexadecimal:

$(134)_{10} = (?)_{16}$

1. Divide the decimal number by 16.
2. Write down the remainder (in hexadecimal).
3. Divide the result again by 16. Treat the division as an integer division.
4. Repeat step 2 and 3 until result is 0.
5. The hexadecimal value is digit sequence of the reminders from last to first.

$(134)_{10} = (86)_{16}$