Relational operators in VHDL - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to compare if signal A is equal to signal B.

VHDL

if A [1] B then
    -- do something
end if;

Drag options to blanks, or click blank then click option'

A<

B/=

C=

D>

Attempts:

3 left

💡 Hint

Common Mistakes

Using /= which means 'not equal'.

Using < or > which are for less or greater comparisons.

The relational operator = checks if two signals are equal in VHDL.

2fill in blank

medium

Complete the code to check if signal X is not equal to signal Y.

VHDL

if X [1] Y then
    -- do something
end if;

Drag options to blanks, or click blank then click option'

A/=

B=

C<=

D>=

Attempts:

3 left

💡 Hint

Common Mistakes

Using = which checks equality instead.

Using relational operators like <= or >= which check order.

The operator /= means 'not equal to' in VHDL.

3fill in blank

hard

Fix the error in the code to check if signal M is less than signal N.

VHDL

if M [1] N then
    -- do something
end if;

Drag options to blanks, or click blank then click option'

A>

B<

C=

D/=

Attempts:

3 left

💡 Hint

Common Mistakes

Using > which means 'greater than'.

Using = or /= which check equality or inequality.

The operator < checks if one signal is less than another in VHDL.

4fill in blank

hard

Fill both blanks to check if signal P is greater than or equal to signal Q.

VHDL

if P [1] Q [2] then
    -- do something
end if;

Drag options to blanks, or click blank then click option'

A>=

B<=

Cthen

Delse

Attempts:

3 left

💡 Hint

Common Mistakes

Using <= instead of >=.

Using else instead of then.

The operator >= means 'greater than or equal to'. The keyword then starts the code block after the condition.

5fill in blank

hard

Fill all three blanks to create a condition that checks if signal R is less than signal S and signal T is not equal to signal U.

VHDL

if R [1] S and T [2] U [3] then
    -- do something
end if;

Drag options to blanks, or click blank then click option'

A<

B/=

Cthen

D=

Attempts:

3 left

💡 Hint

Common Mistakes

Using = instead of /= for inequality.

Forgetting the then keyword.

The operator < checks if R is less than S, /= checks if T is not equal to U, and then starts the code block.