7.2. Repeating with Numbers¶
We are going to use a
for loop. A
for loop is one type of loop or way to repeat a statement or set of statements in a program. A
for loop will use a variable and make the variable take on each of the values in a list of numbers one at a time. A list holds values in an order.
Notice that line 3 in the program below ends with a
: and that line 4 is indented four spaces so that it starts under the
number. Indented means that text on the line has spaces at the beginning of the line so that the text doesn’t start right at the left boundary. Both the
: and the indention are required in a loop. Line 3 is the start of the
for loop and line 4 is the body of the loop. The body of the loop is repeated for each value in the list
What is the sum of all the numbers between 1 and 10? Run the program below to calculate the answer.
Discuss topics in this section with classmates.