I made a simple script to add, subtract, multiplie and divide, but it just works for adding, do you guys know how to make it wor

Question

var number1=prompt('please insert first number')
var select1=prompt('Now, insert what do you want: + to adding, - to subtracting, * to multiplication and / to division')
var number2=prompt('insert the second number')
number1= Number(number1)
number2= Number(number2)
if(select1='+'){
alert(number1+number2)
}
else if(select1='-'){
alert(number1-number2)
}
else if(select1='*'){
alert(number1*number2)
}
else if(select1='/'){
alert(number1/number2)
}
else{
alert('sorry, try again')
}

Thanks!!

Answer 1

Use == not =. By using = it will take that value. like
if(select1='+')

now value of select1 is +. use
if(select1=="+")

Answer 2

You have to test using == and not =.
Here, you say "if select1 can be assigned to '+'", not "if select1 is '+'".