1: { 2: n = 52.123456; 3: //alert(typeof n); 4: alert(n); 5: } 6: //有符号右移 7: { 8: n = 52.123456; 9: var n2 = n >> 0; 10: //alert(typeof n2); 11: alert(n2); 12: } 13: //无符号右移 14: { 15: n = 52.123456; 16: var n3 = n >>> 0; 17: //alert(typeof n3); 18: alert(n3); 19: } 20: //左移0位 21: { 22: n = 52.123456; 23: var n4 = n << 0; 24: //alert(typeof n4); 25: alert(n4); 26: } 27: //按位或or 28: { 29: n = 52.123456; 30: var n5 = n | 0; 31: //alert(typeof n5); 32: alert(n5); 33: } 34: //按位异或xor 35: { 36: n = 52.123456; 37: var n6 = n ^ 0; 38: //alert(typeof n6); 39: alert(n6); 40: }