jjlumagbas

# Create a function that given a number, 
# computes the value of the number times 2


# def twice(n):
#     """
#     (number) -> number
#     Produce twice the value of the given number
#     """

jjlumagbas

>>>def twice(x):
...   return x * 2
...
>>>

jjlumagbas

Misconception: "Waiting" if and while

Researchers have found that some students hold the following misconception: if statements "wait" for their conditional statement to become true. When that happens (at whichever point in the program), the corresponding block of code is executed.

For instance, consider this program:

size = 0
if size == 5:

jjlumagbas

#include <stdio.h>

void display(int arr[], int length) {
  for (int i = 0; i < length; i++) {
    printf("%d ", arr[i]);
  }
  printf("\n");
}

// 1