Step-by-step explanation:
pseudo code
var A=90%
var B=80%
var C=70%
var F=60%
var input=input
if(input>=A){
console.log(" A")
}
if(input>=B){
console.log(" B")
if(input>=C){
console.log(" C")
if(input>=F){
console.log("F")
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