Precise words for precise instructions
Computer Science · Key Stage 1 · The School
Vague words computers cannot use
Some words sound fine but mean nothing exact. A BIT. SOME. OVER THERE. A LITTLE. A person can usually guess what you mean. A computer cannot guess at all. It needs an exact number, an exact direction, or an exact name.
Turning vague into precise
Vague: "move forward a bit." Precise: "move forward three steps." Vague: "turn a little." Precise: "turn right 90 degrees." Vague: "put it over there." Precise: "put it on the third shelf." Each precise version has a number or an exact place in it.
Why the precise version wins
Two robots get the vague instruction "turn a little". One turns 10 degrees. The other turns 45 degrees. Both followed the instruction. Neither did what you actually wanted. Give the precise instruction and every robot does the same exact thing.
Fixing a vague recipe step
A recipe says "add some sugar and bake it for a while." Follow it exactly and every cake comes out different. Rewrite it precisely: "add 100 grams of sugar and bake for 25 minutes at 180 degrees." Now the exact same cake comes out every time, because the words leave nothing to guess. That is the whole point of a precise instruction.
A habit worth building
Before giving an instruction, check it for vague words. Swap "a bit" for a number. Swap "over there" for an exact place. This habit helps you talk to computers, and it also makes your instructions clearer for people too. It is worth the effort.