javascript - Can't figure out why infinite loop occurs -


i'm practising loops in javascript whilst writing got infinite loop can't solve i'm sure hindsight 20/20 kind of problem cant't see it. loop in meleechoice

/*var meleevalues = function() {*/      var userdmg = math.floor(math.random()* 5 + 10);      var ghouldmg = math.floor(math.random()* 4 + 8);      var ghoulhealth = 100;      var userhealth = 110 ;      var usertotaldmg = 0 ;      var ghoultotaldmg = 0;      var firstatk = function() {      firststrike = math.floor(math.random()* 2 + 1);      if(firststrike === 1) {          ghoulhealth = 100 - usertotaldmg;          console.log("you hit ghoul " + userdmg + " damage");          console.log("the ghoul has " + ghoulhealth + " health left");          userhealth = 110 - ghoultotaldmg;          console.log("ghoul hits " + userdmg + " damage");          console.log("you have " + userhealth + " health left");      } else {         userhealth = 110 - ghoultotaldmg;         console.log("ghoul hits " + userdmg + " damage");         console.log("you have " + userhealth + " health left");         ghoulhealth = 100 - usertotaldmg;         console.log("you hit ghoul " + userdmg + " damage");         console.log("the ghoul has " + ghoulhealth + " health left");      }  }      var meleechoice = function() {      while(ghoulhealth > 0 && userhealth > 0) {      usertotaldmg += userdmg;      ghoultotaldmg += ghouldmg;      firstatk;      userdmg = math.floor(math.random()* 5 + 10);      ghouldmg = math.floor(math.random()* 4 + 8);      if (ghoulhealth < 0 && userhealth > 0) {          console.log("congratulations, have defeated ghoul , gained 20xp");      } else if (ghoulhealth > 0 && userhealth < 0) {          console.log("you have been slain ghoul, may corpse serve warning future explorers");      } else {          console.log("it's not on yet");      }      }  }    meleechoice()      /*var user = prompt("you run ghoul whilst exploring dungeon, choose do?", "fight | sneak | run").tolowercase();    switch(user) {      case "fight":          var fight = prompt("do use melee or magic").tolowercase()          if(fight === "melee") {              meleechoice          }  }*/    thanks

if @ predicate in while loop, see depends on both ghoulhealth userhealth. yet inside loop never change values of either of these. means if predicate true @ start, loop commence , predicate forever remain true.

as pointed out in comments well, seems due how using function firstatk. should call firstatk(), note parentheses. , there mistakes in logic method seems. userhealth , ghoulhealth start @ 100 / 110 respectively, health might never drop low enough make predicate false.


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