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| p5js-week-03 [2023/07/05 00:10] – reina.chen | p5js-week-03 [2023/07/11 22:50] (current) – reina.chen |
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| The <color black/yellow>let</color> keyword protects our variable. toastRed is the variable name. The equal sign is used to <color black/pink>assign</color> a value to the variable. Remember, a variable is like a box to keep things in. Do you remember the bread box from before? We can set (assign) this variable to a new number by using the same variable name and a different value: | The <color black/yellow>let</color> keyword protects our variable. toastRed is the variable name. The __equal sign__ is used to <color black/pink>assign</color> a value to the variable. Remember, a variable is like a box to keep things in. Do you remember the bread box from before? We can set (assign) this variable to a new number by using the same variable name and a different value: |
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| The variable name on the left followed by the equal sign means we are assigning it. Since we assigned it before, that means we are reassigning it now. The value on the right is the old value plus one. In other words, we are adding one to the current value and then storing that new value in the same box (variable). Try evaluating this line multiple times and see what happens. | The variable name on the left followed by the __equal sign__ means we are assigning it. Since we assigned it before, that means we are reassigning it now. The value on the right is the old value plus one. In other words, we are adding one to the current value and then storing that new value in the same box (variable). Try evaluating this line multiple times and see what happens. |
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| In the same way, we can [[p5js-week-03#reassigning_variables_and_incrementing|decrement]] a number. <color black/pink>"Decrement"</color> is the opposite of "[[p5js-week-03#reassigning_variables_and_incrementing|increment]]". It means to make a number go down by steps. | In the same way, we can [[p5js-week-03#reassigning_variables_and_incrementing|decrement]] a number. <color black/pink>"Decrement"</color> is the opposite of "[[p5js-week-03#reassigning_variables_and_incrementing|increment]]". It means to make a number go down by steps. |
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| In all of the cases above, we assigned a new value to the variable by first writing the variable name on the left and then the new value after writing an equal sign. However, there's one more way! | In all of the cases above, we assigned a new value to the variable by first writing the variable name on the left and then the new value after writing an __equal sign__. However, there's one more way! |
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| <code> | <code> |