PSPC - Week 11

What block should be used in order to increase a counter by 1 everytime?

• Set Block
• Change Block
• Ask Block
• Join Block

What will the following Snap application do?

• Say AAAHHHH 20 times and then grow bigger
• Say AAAHHHH  and then grow bigger
• Say AAAHHHH 20 times and grow bigger at the same time
• Say AAAHHHH and grow bigger at the same time

What block would you use to store a variable?

• Move
• Increase
• Set
• Ask

What blocks would you need to create the following applciation?

• Pen down, Repeat, turn and Move
• Pen down, Repeat, Step, Turn
• Draw, Repeat, Move, Turn
• Pen down, Repeat, Move, Turn

READ var
REPEAT UNTIL  var  is equal to  0  
PRINT var   var = var – 2
END REPEAT 
Please state what would be the output of the above pseudocode for var = 8.

• 8, 6, 4, 2, 0
• 8, 7, 6, 5, 4, 3, 2, 1
• 8, 6, 4, 2 
• Nothing will be printed as the loop won’t be executed

READ a, b
REPEAT 3 times  
IF (a>b)  
a = a -1  
ELSE   b = b-2  
ENDIF END REPEAT
For a = 8 and b = 6, what are the values of a and b after the above pseudocode is executed?

•  a = 6, b = 4
• a = 5, b = 6
• a = 8, b = 0