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JS small exercise
2022-07-07 07:14:00 【Luqi zz】
Catalog
4. The user enters a year , Determine the number of days in the year
5. Make a study schedule , Enter the day of the week , Can you remind me what courses to learn today
12. Output the maximum number between two numbers
1. The user enters a number , Determine whether the number is odd or even , If it is not a number, you should also give a prompt
var num = prompt(" Please enter an integer ")*1;
if (num % 2 == 0) {
document.write(num+" even numbers ");
} else {
document.write(num+" Odd number ");
}2. Determine the maximum value between two numbers ( The user enters two numbers , Determine which number is larger )
var str1 = prompt(" Please enter a number 1")*1;
var str2 = prompt(" Please enter a number 2")*1;
if (str1 > str2) {
document.write(" The maximum number is " + str1);
} else {
document.write(" The maximum number is " + str2);
}3. Judgment of grade
var grade = prompt(" Please enter your score ") * 1;
if (grade >= 90) {
document.write(" good ");
} else if (grade >= 80) {
document.write(" good ");
} else if (grade >= 70) {
document.write(" commonly ");
} else if (grade >= 60) {
document.write(" pass ");
} else {
document.write(" fail, ");
}4. The user enters a year , Determine the number of days in the year
var year = prompt(" Please enter the year ") * 1;
if ((year%4==0&&year%100!=0) || year%400==0){
document.write(year+" Years have 366 God ");
}else{
document.write(year+" Years have 365 God ");
}5. Make a study schedule , Enter the day of the week , Can you remind me what courses to learn today
var day = prompt(" Please enter the day of today ：");
if (day > 0 && day <= 7) {
switch (day) {
case "1":
document.write(" Today Monday , Learn Chinese ");
break;
case "2":
document.write(" Today is Tuesday , Learn math ");
break;
case "3":
document.write(" Today is Wednesday , Learn English ");
break;
case "4":
document.write(" Today is Thursday , Study physics ");
break;
case "5":
document.write(" Today is Friday , Learn chemistry ");
break;
case "6":
document.write(" Today is Saturday , Sleep in ");
break;
default:
document.write(" Today Sunday , Have a rest ");
break;
}
} else {
alert(" There's only... A week 7 God ！！！");
}6. The taxi , Start at (2 km ) by 7 element , exceed 2 Kilometers per kilometer 3 Yuan calculation . It is required to calculate the cost according to the distance
var km = prompt(" Please enter the number of kilometers ：");
// var sum;
if (km > 0 && km <= 2) {
document.write(" The cost of this trip is 7 element ");
} else if(km>2){
sum = 7 + (km - 2) * 3;
document.write(" The cost of this trip is " + sum + " element ");
}else{
document.write(" It's impossible to spend money ！！！");
}7. Judgement of leap year （ The condition of leap year is that it can be 4 to be divisible by , But can't be 100 to be divisible by ; Or can be 400 to be divisible by .）
var year = prompt(' Please enter the year ') * 1;
if ((year % 4 == 0 && year % 100 != 0) || year % 400 == 0) {
document.write(year + " Year is a leap year ");
} else {
document.write(year + " It's not a leap year ");
}8. Calculate the amount of blood transfusion according to sex and weight . Women weigh no more than 50kg The amount of blood transfusion is 200 ml , otherwise 250 ml ; Men weigh no more than 60kg The amount of blood transfusion is 250 ml , otherwise 300 ml .
var a = prompt(" Please enter your gender ");
var b = prompt(" Please enter your weight ");
if (a == " Woman ") {
if (b <= 50) {
document.write(" Your blood transfusion volume is 200 ml ");
} else {
document.write(" Your blood transfusion volume is 250 ml ");
}
} else if (a == " male ") {
if (b <= 60) {
document.write(" Your blood transfusion volume is 250 ml ");
} else {
document.write(" Your blood transfusion volume is 300 ml ");
}
} else {
document.write(" Please enter the correct gender ");
}9. When the temperature is higher than 26℃ when , Need to turn on the refrigeration air conditioner ; The temperature is lower than 10℃ Turn on the heating air conditioner ; In other cases, you only need to turn on the air supply mode . Compile automatic temperature control program , The control operation outputs the corresponding prompt string to simulate , such as “ Turn on refrigeration ”
var temperature = prompt(" Please enter the current temperature ：（℃）");
if (temperature > 26) {
document.write(" Turn on refrigeration ！");
} else if (temperature < 10) {
document.write(" Turn on heating ！");
} else {
document.write(" Open air supply ！");
}10. according to 《 Sales Tariff of provincial power grid 》, Household electricity consumption is subject to 3 Gradient charge ： Monthly electricity consumption 150 KWh and below , Per kWh 0.4463 element ,151—400 The kilowatt hour part is 0.4663 element ,401 The part above kilowatt hour is 0.5663 element , Please write the program , When inputting the user's electricity consumption , Work out the expenses to be paid .
var a = prompt(" Please input the monthly electricity consumption （ kw ）：");
var price;
if (a > 0 && a <= 150) {
price = a * 0.4463;
document.write(" The electricity charge you need to pay is " + price + " element .");
} else if (a > 150 && a <= 400) {
price = (a - 150) * 0.4663 + 150 * 0.4463;
document.write(" The electricity charge you need to pay is " + price + " element .");
} else {
price = (a - 400) * 0.5663 + 250 * 0.4663 + 150 * 0.4463;
document.write(" The electricity charge you need to pay is " + price + " element .");
}11. Assuming that the A Ground to B The local train tickets have hard seats and hard sleepers , The prices are 100 and 190 element . According to the regulations of the railway department , minors (18 Under one year old ) Not tall enough 120cm Free of charge ,120( contain )-150( Not included )cm Half fare required ,150 And above require a full ticket , The minor berth can only be reduced by half the price of hard seats . Please design a ticket purchasing procedure , Age and height are required ( Minors need to enter ) And the type of ticket , The price of the output ticket .
var age = prompt(' Please enter age ')*1;
var tick = prompt(' Please enter the ticket type ');
if(age>=18){
if(tick==' Hard seat '){
document.write("100");
}else{
document.write("190");
}
}else{
var height = prompt(' Please enter height ')*1;
if(height<120){
document.write(" free ");
}else if(height<150){
if(tick==' Hard seat '){
document.write("50")
}else{
document.write("140");// Here is the height of minors 120-150 Bought a hard sleeper ticket 190-50( Half price of hard seats )
}
}else{
if(tick==' Hard seat '){
document.write("100")
}else{
document.write("190");
}
}
}12. Output the maximum number between two numbers
var str1 = prompt(" Please enter a number 1");
var str2 = prompt(" Please enter a number 2");
if (str1 > str2) {
document.write(" The maximum number is " + str1);
} else {
document.write(" The maximum number is " + str2);
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